21902920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{577}}^1$

素因数の和:674

約数の個数: 64

約数和(自身を含む): 53892720

約数和(自身を除く): 31989800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 73, 104, 130, 146, 260, 292, 365, 520, 577, 584, 730, 949, 1154, 1460, 1898, 2308, 2885, 2920, 3796, 4616, 4745, 5770, 7501, 7592, 9490, 11540, 15002, 18980, 23080, 30004, 37505, 37960, 42121, 60008, 75010, 84242, 150020, 168484, 210605, 300040, 336968, 421210, 547573, 842420, 1095146, 1684840, 2190292, 2737865, 4380584, 5475730, 10951460, 21902920]

約数ペア:

[(1, 21902920), (2, 10951460), (4, 5475730), (5, 4380584), (8, 2737865), (10, 2190292), (13, 1684840), (20, 1095146), (26, 842420), (40, 547573), (52, 421210), (65, 336968), (73, 300040), (104, 210605), (130, 168484), (146, 150020), (260, 84242), (292, 75010), (365, 60008), (520, 42121), (577, 37960), (584, 37505), (730, 30004), (949, 23080), (1154, 18980), (1460, 15002), (1898, 11540), (2308, 9490), (2885, 7592), (2920, 7501), (3796, 5770), (4616, 4745)]