21990122

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{20399}}^1$

素因数の和:20426

約数の個数: 24

約数和(自身を含む): 41860800

約数和(自身を除く): 19870678

約数列:

[1, 2, 7, 11, 14, 22, 49, 77, 98, 154, 539, 1078, 20399, 40798, 142793, 224389, 285586, 448778, 999551, 1570723, 1999102, 3141446, 10995061, 21990122]

約数ペア:

[(1, 21990122), (2, 10995061), (7, 3141446), (11, 1999102), (14, 1570723), (22, 999551), (49, 448778), (77, 285586), (98, 224389), (154, 142793), (539, 40798), (1078, 20399)]