28980440

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^2\times {\mathrm{431}}^1$

素因数の和:524

約数の個数: 48

約数和(自身を含む): 66990240

約数和(自身を除く): 38009800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 431, 820, 862, 1640, 1681, 1724, 2155, 3362, 3448, 4310, 6724, 8405, 8620, 13448, 16810, 17240, 17671, 33620, 35342, 67240, 70684, 88355, 141368, 176710, 353420, 706840, 724511, 1449022, 2898044, 3622555, 5796088, 7245110, 14490220, 28980440]

約数ペア:

[(1, 28980440), (2, 14490220), (4, 7245110), (5, 5796088), (8, 3622555), (10, 2898044), (20, 1449022), (40, 724511), (41, 706840), (82, 353420), (164, 176710), (205, 141368), (328, 88355), (410, 70684), (431, 67240), (820, 35342), (862, 33620), (1640, 17671), (1681, 17240), (1724, 16810), (2155, 13448), (3362, 8620), (3448, 8405), (4310, 6724)]