21780418

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{313}}^1\times {\mathrm{3163}}^1$

素因数の和:3489

約数の個数: 16

約数和(自身を含む): 35765856

約数和(自身を除く): 13985438

約数列:

[1, 2, 11, 22, 313, 626, 3163, 3443, 6326, 6886, 34793, 69586, 990019, 1980038, 10890209, 21780418]

約数ペア:

[(1, 21780418), (2, 10890209), (11, 1980038), (22, 990019), (313, 69586), (626, 34793), (3163, 6886), (3443, 6326)]