21690655

素因数分解:

$5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{6389}}^1$

素因数の和:6498

約数の個数: 16

約数和(自身を含む): 30058560

約数和(自身を除く): 8367905

約数列:

[1, 5, 7, 35, 97, 485, 679, 3395, 6389, 31945, 44723, 223615, 619733, 3098665, 4338131, 21690655]

約数ペア:

[(1, 21690655), (5, 4338131), (7, 3098665), (35, 619733), (97, 223615), (485, 44723), (679, 31945), (3395, 6389)]