21000640

素因数分解:

$2^6\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1$

素因数の和:150

約数の個数: 112

約数和(自身を含む): 54132480

約数和(自身を除く): 33131840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 31, 32, 40, 58, 62, 64, 73, 80, 116, 124, 145, 146, 155, 160, 232, 248, 290, 292, 310, 320, 365, 464, 496, 580, 584, 620, 730, 899, 928, 992, 1160, 1168, 1240, 1460, 1798, 1856, 1984, 2117, 2263, 2320, 2336, 2480, 2920, 3596, 4234, 4495, 4526, 4640, 4672, 4960, 5840, 7192, 8468, 8990, 9052, 9280, 9920, 10585, 11315, 11680, 14384, 16936, 17980, 18104, 21170, 22630, 23360, 28768, 33872, 35960, 36208, 42340, 45260, 57536, 65627, 67744, 71920, 72416, 84680, 90520, 131254, 135488, 143840, 144832, 169360, 181040, 262508, 287680, 328135, 338720, 362080, 525016, 656270, 677440, 724160, 1050032, 1312540, 2100064, 2625080, 4200128, 5250160, 10500320, 21000640]

約数ペア:

[(1, 21000640), (2, 10500320), (4, 5250160), (5, 4200128), (8, 2625080), (10, 2100064), (16, 1312540), (20, 1050032), (29, 724160), (31, 677440), (32, 656270), (40, 525016), (58, 362080), (62, 338720), (64, 328135), (73, 287680), (80, 262508), (116, 181040), (124, 169360), (145, 144832), (146, 143840), (155, 135488), (160, 131254), (232, 90520), (248, 84680), (290, 72416), (292, 71920), (310, 67744), (320, 65627), (365, 57536), (464, 45260), (496, 42340), (580, 36208), (584, 35960), (620, 33872), (730, 28768), (899, 23360), (928, 22630), (992, 21170), (1160, 18104), (1168, 17980), (1240, 16936), (1460, 14384), (1798, 11680), (1856, 11315), (1984, 10585), (2117, 9920), (2263, 9280), (2320, 9052), (2336, 8990), (2480, 8468), (2920, 7192), (3596, 5840), (4234, 4960), (4495, 4672), (4526, 4640)]