20747920

素因数分解:

$2^4\times 5^1\times {\mathrm{223}}^1\times {\mathrm{1163}}^1$

素因数の和:1399

約数の個数: 40

約数和(自身を含む): 48496896

約数和(自身を除く): 27748976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 223, 446, 892, 1115, 1163, 1784, 2230, 2326, 3568, 4460, 4652, 5815, 8920, 9304, 11630, 17840, 18608, 23260, 46520, 93040, 259349, 518698, 1037396, 1296745, 2074792, 2593490, 4149584, 5186980, 10373960, 20747920]

約数ペア:

[(1, 20747920), (2, 10373960), (4, 5186980), (5, 4149584), (8, 2593490), (10, 2074792), (16, 1296745), (20, 1037396), (40, 518698), (80, 259349), (223, 93040), (446, 46520), (892, 23260), (1115, 18608), (1163, 17840), (1784, 11630), (2230, 9304), (2326, 8920), (3568, 5815), (4460, 4652)]