20718278

素因数分解:

$2^1\times 7^2\times {\mathrm{163}}^1\times {\mathrm{1297}}^1$

素因数の和:1476

約数の個数: 24

約数和(自身を含む): 36401112

約数和(自身を除く): 15682834

約数列:

[1, 2, 7, 14, 49, 98, 163, 326, 1141, 1297, 2282, 2594, 7987, 9079, 15974, 18158, 63553, 127106, 211411, 422822, 1479877, 2959754, 10359139, 20718278]

約数ペア:

[(1, 20718278), (2, 10359139), (7, 2959754), (14, 1479877), (49, 422822), (98, 211411), (163, 127106), (326, 63553), (1141, 18158), (1297, 15974), (2282, 9079), (2594, 7987)]