21695931

素因数分解:

$3^4\times {\mathrm{61}}^1\times {\mathrm{4391}}^1$

素因数の和:4464

約数の個数: 20

約数和(自身を含む): 32948784

約数和(自身を除く): 11252853

約数列:

[1, 3, 9, 27, 61, 81, 183, 549, 1647, 4391, 4941, 13173, 39519, 118557, 267851, 355671, 803553, 2410659, 7231977, 21695931]

約数ペア:

[(1, 21695931), (3, 7231977), (9, 2410659), (27, 803553), (61, 355671), (81, 267851), (183, 118557), (549, 39519), (1647, 13173), (4391, 4941)]