21747561

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{661}}^1\times {\mathrm{997}}^1$

素因数の和:1672

約数の個数: 16

約数和(自身を含む): 31712448

約数和(自身を除く): 9964887

約数列:

[1, 3, 11, 33, 661, 997, 1983, 2991, 7271, 10967, 21813, 32901, 659017, 1977051, 7249187, 21747561]

約数ペア:

[(1, 21747561), (3, 7249187), (11, 1977051), (33, 659017), (661, 32901), (997, 21813), (1983, 10967), (2991, 7271)]