21156531

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{557}}^1\times {\mathrm{1151}}^1$

素因数の和:1722

約数の個数: 16

約数和(自身を含む): 30855168

約数和(自身を除く): 9698637

約数列:

[1, 3, 11, 33, 557, 1151, 1671, 3453, 6127, 12661, 18381, 37983, 641107, 1923321, 7052177, 21156531]

約数ペア:

[(1, 21156531), (3, 7052177), (11, 1923321), (33, 641107), (557, 37983), (1151, 18381), (1671, 12661), (3453, 6127)]