21915660

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{28097}}^1$

素因数の和:28122

約数の個数: 48

約数和(自身を含む): 66086496

約数和(自身を除く): 44170836

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 28097, 56194, 84291, 112388, 140485, 168582, 280970, 337164, 365261, 421455, 561940, 730522, 842910, 1095783, 1461044, 1685820, 1826305, 2191566, 3652610, 4383132, 5478915, 7305220, 10957830, 21915660]

約数ペア:

[(1, 21915660), (2, 10957830), (3, 7305220), (4, 5478915), (5, 4383132), (6, 3652610), (10, 2191566), (12, 1826305), (13, 1685820), (15, 1461044), (20, 1095783), (26, 842910), (30, 730522), (39, 561940), (52, 421455), (60, 365261), (65, 337164), (78, 280970), (130, 168582), (156, 140485), (195, 112388), (260, 84291), (390, 56194), (780, 28097)]