640948560

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{31}}^2\times {\mathrm{397}}^1$

素因数の和:482

約数の個数: 240

約数和(自身を含む): 2352313728

約数和(自身を除く): 1711365168

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 31, 35, 40, 42, 48, 56, 60, 62, 70, 80, 84, 93, 105, 112, 120, 124, 140, 155, 168, 186, 210, 217, 240, 248, 280, 310, 336, 372, 397, 420, 434, 465, 496, 560, 620, 651, 744, 794, 840, 868, 930, 961, 1085, 1191, 1240, 1302, 1488, 1588, 1680, 1736, 1860, 1922, 1985, 2170, 2382, 2480, 2604, 2779, 2883, 3176, 3255, 3472, 3720, 3844, 3970, 4340, 4764, 4805, 5208, 5558, 5766, 5955, 6352, 6510, 6727, 7440, 7688, 7940, 8337, 8680, 9528, 9610, 10416, 11116, 11532, 11910, 12307, 13020, 13454, 13895, 14415, 15376, 15880, 16674, 17360, 19056, 19220, 20181, 22232, 23064, 23820, 24614, 26040, 26908, 27790, 28830, 31760, 33348, 33635, 36921, 38440, 40362, 41685, 44464, 46128, 47640, 49228, 52080, 53816, 55580, 57660, 61535, 66696, 67270, 73842, 76880, 80724, 83370, 86149, 95280, 98456, 100905, 107632, 111160, 115320, 123070, 133392, 134540, 147684, 161448, 166740, 172298, 184605, 196912, 201810, 222320, 230640, 246140, 258447, 269080, 295368, 322896, 333480, 344596, 369210, 381517, 403620, 430745, 492280, 516894, 538160, 590736, 666960, 689192, 738420, 763034, 807240, 861490, 984560, 1033788, 1144551, 1292235, 1378384, 1476840, 1526068, 1614480, 1722980, 1907585, 2067576, 2289102, 2584470, 2670619, 2953680, 3052136, 3445960, 3815170, 4135152, 4578204, 5168940, 5341238, 5722755, 6104272, 6891920, 7630340, 8011857, 9156408, 10337880, 10682476, 11445510, 13353095, 15260680, 16023714, 18312816, 20675760, 21364952, 22891020, 26706190, 30521360, 32047428, 40059285, 42729904, 45782040, 53412380, 64094856, 80118570, 91564080, 106824760, 128189712, 160237140, 213649520, 320474280, 640948560]

約数ペア:

[(1, 640948560), (2, 320474280), (3, 213649520), (4, 160237140), (5, 128189712), (6, 106824760), (7, 91564080), (8, 80118570), (10, 64094856), (12, 53412380), (14, 45782040), (15, 42729904), (16, 40059285), (20, 32047428), (21, 30521360), (24, 26706190), (28, 22891020), (30, 21364952), (31, 20675760), (35, 18312816), (40, 16023714), (42, 15260680), (48, 13353095), (56, 11445510), (60, 10682476), (62, 10337880), (70, 9156408), (80, 8011857), (84, 7630340), (93, 6891920), (105, 6104272), (112, 5722755), (120, 5341238), (124, 5168940), (140, 4578204), (155, 4135152), (168, 3815170), (186, 3445960), (210, 3052136), (217, 2953680), (240, 2670619), (248, 2584470), (280, 2289102), (310, 2067576), (336, 1907585), (372, 1722980), (397, 1614480), (420, 1526068), (434, 1476840), (465, 1378384), (496, 1292235), (560, 1144551), (620, 1033788), (651, 984560), (744, 861490), (794, 807240), (840, 763034), (868, 738420), (930, 689192), (961, 666960), (1085, 590736), (1191, 538160), (1240, 516894), (1302, 492280), (1488, 430745), (1588, 403620), (1680, 381517), (1736, 369210), (1860, 344596), (1922, 333480), (1985, 322896), (2170, 295368), (2382, 269080), (2480, 258447), (2604, 246140), (2779, 230640), (2883, 222320), (3176, 201810), (3255, 196912), (3472, 184605), (3720, 172298), (3844, 166740), (3970, 161448), (4340, 147684), (4764, 134540), (4805, 133392), (5208, 123070), (5558, 115320), (5766, 111160), (5955, 107632), (6352, 100905), (6510, 98456), (6727, 95280), (7440, 86149), (7688, 83370), (7940, 80724), (8337, 76880), (8680, 73842), (9528, 67270), (9610, 66696), (10416, 61535), (11116, 57660), (11532, 55580), (11910, 53816), (12307, 52080), (13020, 49228), (13454, 47640), (13895, 46128), (14415, 44464), (15376, 41685), (15880, 40362), (16674, 38440), (17360, 36921), (19056, 33635), (19220, 33348), (20181, 31760), (22232, 28830), (23064, 27790), (23820, 26908), (24614, 26040)]