21241480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40849}}^1$

素因数の和:40873

約数の個数: 32

約数和(自身を含む): 51471000

約数和(自身を除く): 30229520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40849, 81698, 163396, 204245, 326792, 408490, 531037, 816980, 1062074, 1633960, 2124148, 2655185, 4248296, 5310370, 10620740, 21241480]

約数ペア:

[(1, 21241480), (2, 10620740), (4, 5310370), (5, 4248296), (8, 2655185), (10, 2124148), (13, 1633960), (20, 1062074), (26, 816980), (40, 531037), (52, 408490), (65, 326792), (104, 204245), (130, 163396), (260, 81698), (520, 40849)]