28178980

素因数分解:

$2^2\times 5^1\times {\mathrm{691}}^1\times {\mathrm{2039}}^1$

素因数の和:2739

約数の個数: 24

約数和(自身を含む): 59290560

約数和(自身を除く): 31111580

約数列:

[1, 2, 4, 5, 10, 20, 691, 1382, 2039, 2764, 3455, 4078, 6910, 8156, 10195, 13820, 20390, 40780, 1408949, 2817898, 5635796, 7044745, 14089490, 28178980]

約数ペア:

[(1, 28178980), (2, 14089490), (4, 7044745), (5, 5635796), (10, 2817898), (20, 1408949), (691, 40780), (1382, 20390), (2039, 13820), (2764, 10195), (3455, 8156), (4078, 6910)]