21120620

素因数分解:

$2^2\times 5^1\times {\mathrm{739}}^1\times {\mathrm{1429}}^1$

素因数の和:2177

約数の個数: 24

約数和(自身を含む): 44444400

約数和(自身を除く): 23323780

約数列:

[1, 2, 4, 5, 10, 20, 739, 1429, 1478, 2858, 2956, 3695, 5716, 7145, 7390, 14290, 14780, 28580, 1056031, 2112062, 4224124, 5280155, 10560310, 21120620]

約数ペア:

[(1, 21120620), (2, 10560310), (4, 5280155), (5, 4224124), (10, 2112062), (20, 1056031), (739, 28580), (1429, 14780), (1478, 14290), (2858, 7390), (2956, 7145), (3695, 5716)]