20675760

素因数分解:

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

素因数の和:451

約数の個数: 160

約数和(自身を含む): 75804672

約数和(自身を除く): 55128912

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, 1085, 1191, 1240, 1302, 1488, 1588, 1680, 1736, 1860, 1985, 2170, 2382, 2480, 2604, 2779, 3176, 3255, 3472, 3720, 3970, 4340, 4764, 5208, 5558, 5955, 6352, 6510, 7440, 7940, 8337, 8680, 9528, 10416, 11116, 11910, 12307, 13020, 13895, 15880, 16674, 17360, 19056, 22232, 23820, 24614, 26040, 27790, 31760, 33348, 36921, 41685, 44464, 47640, 49228, 52080, 55580, 61535, 66696, 73842, 83370, 86149, 95280, 98456, 111160, 123070, 133392, 147684, 166740, 172298, 184605, 196912, 222320, 246140, 258447, 295368, 333480, 344596, 369210, 430745, 492280, 516894, 590736, 666960, 689192, 738420, 861490, 984560, 1033788, 1292235, 1378384, 1476840, 1722980, 2067576, 2584470, 2953680, 3445960, 4135152, 5168940, 6891920, 10337880, 20675760]

約数ペア:

[(1, 20675760), (2, 10337880), (3, 6891920), (4, 5168940), (5, 4135152), (6, 3445960), (7, 2953680), (8, 2584470), (10, 2067576), (12, 1722980), (14, 1476840), (15, 1378384), (16, 1292235), (20, 1033788), (21, 984560), (24, 861490), (28, 738420), (30, 689192), (31, 666960), (35, 590736), (40, 516894), (42, 492280), (48, 430745), (56, 369210), (60, 344596), (62, 333480), (70, 295368), (80, 258447), (84, 246140), (93, 222320), (105, 196912), (112, 184605), (120, 172298), (124, 166740), (140, 147684), (155, 133392), (168, 123070), (186, 111160), (210, 98456), (217, 95280), (240, 86149), (248, 83370), (280, 73842), (310, 66696), (336, 61535), (372, 55580), (397, 52080), (420, 49228), (434, 47640), (465, 44464), (496, 41685), (560, 36921), (620, 33348), (651, 31760), (744, 27790), (794, 26040), (840, 24614), (868, 23820), (930, 22232), (1085, 19056), (1191, 17360), (1240, 16674), (1302, 15880), (1488, 13895), (1588, 13020), (1680, 12307), (1736, 11910), (1860, 11116), (1985, 10416), (2170, 9528), (2382, 8680), (2480, 8337), (2604, 7940), (2779, 7440), (3176, 6510), (3255, 6352), (3472, 5955), (3720, 5558), (3970, 5208), (4340, 4764)]