21200920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40771}}^1$

素因数の和:40795

約数の個数: 32

約数和(自身を含む): 51372720

約数和(自身を除く): 30171800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40771, 81542, 163084, 203855, 326168, 407710, 530023, 815420, 1060046, 1630840, 2120092, 2650115, 4240184, 5300230, 10600460, 21200920]

約数ペア:

[(1, 21200920), (2, 10600460), (4, 5300230), (5, 4240184), (8, 2650115), (10, 2120092), (13, 1630840), (20, 1060046), (26, 815420), (40, 530023), (52, 407710), (65, 326168), (104, 203855), (130, 163084), (260, 81542), (520, 40771)]