21811790

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2179}}^1$

素因数の和:2217

約数の個数: 64

約数和(自身を含む): 52738560

約数和(自身を除く): 30926770

約数列:

[1, 2, 5, 7, 10, 11, 13, 14, 22, 26, 35, 55, 65, 70, 77, 91, 110, 130, 143, 154, 182, 286, 385, 455, 715, 770, 910, 1001, 1430, 2002, 2179, 4358, 5005, 10010, 10895, 15253, 21790, 23969, 28327, 30506, 47938, 56654, 76265, 119845, 141635, 152530, 167783, 198289, 239690, 283270, 311597, 335566, 396578, 623194, 838915, 991445, 1557985, 1677830, 1982890, 2181179, 3115970, 4362358, 10905895, 21811790]

約数ペア:

[(1, 21811790), (2, 10905895), (5, 4362358), (7, 3115970), (10, 2181179), (11, 1982890), (13, 1677830), (14, 1557985), (22, 991445), (26, 838915), (35, 623194), (55, 396578), (65, 335566), (70, 311597), (77, 283270), (91, 239690), (110, 198289), (130, 167783), (143, 152530), (154, 141635), (182, 119845), (286, 76265), (385, 56654), (455, 47938), (715, 30506), (770, 28327), (910, 23969), (1001, 21790), (1430, 15253), (2002, 10895), (2179, 10010), (4358, 5005)]