21000947990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1213}}^1\times {\mathrm{157393}}^1$

素因数の和:158624

約数の個数: 32

約数和(自身を含む): 41272484256

約数和(自身を除く): 20271536266

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 1213, 2426, 6065, 12130, 13343, 26686, 66715, 133430, 157393, 314786, 786965, 1573930, 1731323, 3462646, 8656615, 17313230, 190917709, 381835418, 954588545, 1909177090, 2100094799, 4200189598, 10500473995, 21000947990]

約数ペア:

[(1, 21000947990), (2, 10500473995), (5, 4200189598), (10, 2100094799), (11, 1909177090), (22, 954588545), (55, 381835418), (110, 190917709), (1213, 17313230), (2426, 8656615), (6065, 3462646), (12130, 1731323), (13343, 1573930), (26686, 786965), (66715, 314786), (133430, 157393)]