21691418

素因数分解:

$2^1\times 7^2\times {\mathrm{389}}^1\times {\mathrm{569}}^1$

素因数の和:974

約数の個数: 24

約数和(自身を含む): 38013300

約数和(自身を除く): 16321882

約数列:

[1, 2, 7, 14, 49, 98, 389, 569, 778, 1138, 2723, 3983, 5446, 7966, 19061, 27881, 38122, 55762, 221341, 442682, 1549387, 3098774, 10845709, 21691418]

約数ペア:

[(1, 21691418), (2, 10845709), (7, 3098774), (14, 1549387), (49, 442682), (98, 221341), (389, 55762), (569, 38122), (778, 27881), (1138, 19061), (2723, 7966), (3983, 5446)]