21054290

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{919}}^1$

素因数の和:1034

約数の個数: 32

約数和(自身を含む): 39744000

約数和(自身を除く): 18689710

約数列:

[1, 2, 5, 10, 29, 58, 79, 145, 158, 290, 395, 790, 919, 1838, 2291, 4582, 4595, 9190, 11455, 22910, 26651, 53302, 72601, 133255, 145202, 266510, 363005, 726010, 2105429, 4210858, 10527145, 21054290]

約数ペア:

[(1, 21054290), (2, 10527145), (5, 4210858), (10, 2105429), (29, 726010), (58, 363005), (79, 266510), (145, 145202), (158, 133255), (290, 72601), (395, 53302), (790, 26651), (919, 22910), (1838, 11455), (2291, 9190), (4582, 4595)]