21695457

素因数分解:

$3^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{7541}}^1$

素因数の和:7688

約数の個数: 16

約数和(自身を含む): 33305472

約数和(自身を除く): 11610015

約数列:

[1, 3, 7, 21, 137, 411, 959, 2877, 7541, 22623, 52787, 158361, 1033117, 3099351, 7231819, 21695457]

約数ペア:

[(1, 21695457), (3, 7231819), (7, 3099351), (21, 1033117), (137, 158361), (411, 52787), (959, 22623), (2877, 7541)]