21271161640

素因数分解:

$2^3\times 5^1\times {\mathrm{531779041}}^1$

素因数の和:531779052

約数の個数: 16

約数和(自身を含む): 47860113780

約数和(自身を除く): 26588952140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 531779041, 1063558082, 2127116164, 2658895205, 4254232328, 5317790410, 10635580820, 21271161640]

約数ペア:

[(1, 21271161640), (2, 10635580820), (4, 5317790410), (5, 4254232328), (8, 2658895205), (10, 2127116164), (20, 1063558082), (40, 531779041)]