21123431

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{311}}^1\times {\mathrm{313}}^1$

素因数の和:662

約数の個数: 16

約数和(自身を含む): 25079808

約数和(自身を除く): 3956377

約数列:

[1, 7, 31, 217, 311, 313, 2177, 2191, 9641, 9703, 67487, 67921, 97343, 681401, 3017633, 21123431]

約数ペア:

[(1, 21123431), (7, 3017633), (31, 681401), (217, 97343), (311, 67921), (313, 67487), (2177, 9703), (2191, 9641)]