21965185

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{6547}}^1$

素因数の和:6624

約数の個数: 16

約数和(自身を含む): 29230272

約数和(自身を除く): 7265087

約数列:

[1, 5, 11, 55, 61, 305, 671, 3355, 6547, 32735, 72017, 360085, 399367, 1996835, 4393037, 21965185]

約数ペア:

[(1, 21965185), (5, 4393037), (11, 1996835), (55, 399367), (61, 360085), (305, 72017), (671, 32735), (3355, 6547)]