21890960

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1$

素因数の和:161

約数の個数: 160

約数和(自身を含む): 65329152

約数和(自身を除く): 43438192

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 31, 35, 40, 52, 56, 62, 65, 70, 80, 91, 97, 104, 112, 124, 130, 140, 155, 182, 194, 208, 217, 248, 260, 280, 310, 364, 388, 403, 434, 455, 485, 496, 520, 560, 620, 679, 728, 776, 806, 868, 910, 970, 1040, 1085, 1240, 1261, 1358, 1456, 1552, 1612, 1736, 1820, 1940, 2015, 2170, 2480, 2522, 2716, 2821, 3007, 3224, 3395, 3472, 3640, 3880, 4030, 4340, 5044, 5432, 5642, 6014, 6305, 6448, 6790, 7280, 7760, 8060, 8680, 8827, 10088, 10864, 11284, 12028, 12610, 13580, 14105, 15035, 16120, 17360, 17654, 20176, 21049, 22568, 24056, 25220, 27160, 28210, 30070, 32240, 35308, 39091, 42098, 44135, 45136, 48112, 50440, 54320, 56420, 60140, 70616, 78182, 84196, 88270, 100880, 105245, 112840, 120280, 141232, 156364, 168392, 176540, 195455, 210490, 225680, 240560, 273637, 312728, 336784, 353080, 390910, 420980, 547274, 625456, 706160, 781820, 841960, 1094548, 1368185, 1563640, 1683920, 2189096, 2736370, 3127280, 4378192, 5472740, 10945480, 21890960]

約数ペア:

[(1, 21890960), (2, 10945480), (4, 5472740), (5, 4378192), (7, 3127280), (8, 2736370), (10, 2189096), (13, 1683920), (14, 1563640), (16, 1368185), (20, 1094548), (26, 841960), (28, 781820), (31, 706160), (35, 625456), (40, 547274), (52, 420980), (56, 390910), (62, 353080), (65, 336784), (70, 312728), (80, 273637), (91, 240560), (97, 225680), (104, 210490), (112, 195455), (124, 176540), (130, 168392), (140, 156364), (155, 141232), (182, 120280), (194, 112840), (208, 105245), (217, 100880), (248, 88270), (260, 84196), (280, 78182), (310, 70616), (364, 60140), (388, 56420), (403, 54320), (434, 50440), (455, 48112), (485, 45136), (496, 44135), (520, 42098), (560, 39091), (620, 35308), (679, 32240), (728, 30070), (776, 28210), (806, 27160), (868, 25220), (910, 24056), (970, 22568), (1040, 21049), (1085, 20176), (1240, 17654), (1261, 17360), (1358, 16120), (1456, 15035), (1552, 14105), (1612, 13580), (1736, 12610), (1820, 12028), (1940, 11284), (2015, 10864), (2170, 10088), (2480, 8827), (2522, 8680), (2716, 8060), (2821, 7760), (3007, 7280), (3224, 6790), (3395, 6448), (3472, 6305), (3640, 6014), (3880, 5642), (4030, 5432), (4340, 5044)]