21515890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{195599}}^1$

素因数の和:195617

約数の個数: 16

約数和(自身を含む): 42249600

約数和(自身を除く): 20733710

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 195599, 391198, 977995, 1955990, 2151589, 4303178, 10757945, 21515890]

約数ペア:

[(1, 21515890), (2, 10757945), (5, 4303178), (10, 2151589), (11, 1955990), (22, 977995), (55, 391198), (110, 195599)]