19909409

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{389}}^1$

素因数の和:560

約数の個数: 16

約数和(自身を含む): 22364160

約数和(自身を除く): 2454751

約数列:

[1, 13, 31, 127, 389, 403, 1651, 3937, 5057, 12059, 49403, 51181, 156767, 642239, 1531493, 19909409]

約数ペア:

[(1, 19909409), (13, 1531493), (31, 642239), (127, 156767), (389, 51181), (403, 49403), (1651, 12059), (3937, 5057)]