21156536

素因数分解:

$2^3\times {\mathrm{659}}^1\times {\mathrm{4013}}^1$

素因数の和:4678

約数の個数: 16

約数和(自身を含む): 39738600

約数和(自身を除く): 18582064

約数列:

[1, 2, 4, 8, 659, 1318, 2636, 4013, 5272, 8026, 16052, 32104, 2644567, 5289134, 10578268, 21156536]

約数ペア:

[(1, 21156536), (2, 10578268), (4, 5289134), (8, 2644567), (659, 32104), (1318, 16052), (2636, 8026), (4013, 5272)]