21089692

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{431}}^1\times {\mathrm{941}}^1$

素因数の和:1389

約数の個数: 24

約数和(自身を含む): 39880512

約数和(自身を除く): 18790820

約数列:

[1, 2, 4, 13, 26, 52, 431, 862, 941, 1724, 1882, 3764, 5603, 11206, 12233, 22412, 24466, 48932, 405571, 811142, 1622284, 5272423, 10544846, 21089692]

約数ペア:

[(1, 21089692), (2, 10544846), (4, 5272423), (13, 1622284), (26, 811142), (52, 405571), (431, 48932), (862, 24466), (941, 22412), (1724, 12233), (1882, 11206), (3764, 5603)]