21396980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97259}}^1$

素因数の和:97279

約数の個数: 24

約数和(自身を含む): 49019040

約数和(自身を除く): 27622060

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 97259, 194518, 389036, 486295, 972590, 1069849, 1945180, 2139698, 4279396, 5349245, 10698490, 21396980]

約数ペア:

[(1, 21396980), (2, 10698490), (4, 5349245), (5, 4279396), (10, 2139698), (11, 1945180), (20, 1069849), (22, 972590), (44, 486295), (55, 389036), (110, 194518), (220, 97259)]