28717880

素因数分解:

$2^3\times 5^1\times {\mathrm{457}}^1\times {\mathrm{1571}}^1$

素因数の和:2039

約数の個数: 32

約数和(自身を含む): 64797840

約数和(自身を除く): 36079960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 457, 914, 1571, 1828, 2285, 3142, 3656, 4570, 6284, 7855, 9140, 12568, 15710, 18280, 31420, 62840, 717947, 1435894, 2871788, 3589735, 5743576, 7179470, 14358940, 28717880]

約数ペア:

[(1, 28717880), (2, 14358940), (4, 7179470), (5, 5743576), (8, 3589735), (10, 2871788), (20, 1435894), (40, 717947), (457, 62840), (914, 31420), (1571, 18280), (1828, 15710), (2285, 12568), (3142, 9140), (3656, 7855), (4570, 6284)]