669980

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{241}}^1$

素因数の和:389

約数の個数: 24

約数和(自身を含む): 1422960

約数和(自身を除く): 752980

約数列:

[1, 2, 4, 5, 10, 20, 139, 241, 278, 482, 556, 695, 964, 1205, 1390, 2410, 2780, 4820, 33499, 66998, 133996, 167495, 334990, 669980]

約数ペア:

[(1, 669980), (2, 334990), (4, 167495), (5, 133996), (10, 66998), (20, 33499), (139, 4820), (241, 2780), (278, 2410), (482, 1390), (556, 1205), (695, 964)]