21155661

素因数分解:

$3^4\times {\mathrm{139}}^1\times {\mathrm{1879}}^1$

素因数の和:2030

約数の個数: 20

約数和(自身を含む): 31847200

約数和(自身を除く): 10691539

約数列:

[1, 3, 9, 27, 81, 139, 417, 1251, 1879, 3753, 5637, 11259, 16911, 50733, 152199, 261181, 783543, 2350629, 7051887, 21155661]

約数ペア:

[(1, 21155661), (3, 7051887), (9, 2350629), (27, 783543), (81, 261181), (139, 152199), (417, 50733), (1251, 16911), (1879, 11259), (3753, 5637)]