21906437

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1\times {\mathrm{431}}^1$

素因数の和:628

約数の個数: 16

約数和(自身を含む): 25754112

約数和(自身を除く): 3847675

約数列:

[1, 7, 53, 137, 371, 431, 959, 3017, 7261, 22843, 50827, 59047, 159901, 413329, 3129491, 21906437]

約数ペア:

[(1, 21906437), (7, 3129491), (53, 413329), (137, 159901), (371, 59047), (431, 50827), (959, 22843), (3017, 7261)]