19944920

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{103}}^2$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 46280160

約数和(自身を除く): 26335240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 103, 188, 206, 235, 376, 412, 470, 515, 824, 940, 1030, 1880, 2060, 4120, 4841, 9682, 10609, 19364, 21218, 24205, 38728, 42436, 48410, 53045, 84872, 96820, 106090, 193640, 212180, 424360, 498623, 997246, 1994492, 2493115, 3988984, 4986230, 9972460, 19944920]

約数ペア:

[(1, 19944920), (2, 9972460), (4, 4986230), (5, 3988984), (8, 2493115), (10, 1994492), (20, 997246), (40, 498623), (47, 424360), (94, 212180), (103, 193640), (188, 106090), (206, 96820), (235, 84872), (376, 53045), (412, 48410), (470, 42436), (515, 38728), (824, 24205), (940, 21218), (1030, 19364), (1880, 10609), (2060, 9682), (4120, 4841)]