21357904

素因数分解:

$2^4\times {\mathrm{113}}^1\times {\mathrm{11813}}^1$

素因数の和:11934

約数の個数: 20

約数和(自身を含む): 41750676

約数和(自身を除く): 20392772

約数列:

[1, 2, 4, 8, 16, 113, 226, 452, 904, 1808, 11813, 23626, 47252, 94504, 189008, 1334869, 2669738, 5339476, 10678952, 21357904]

約数ペア:

[(1, 21357904), (2, 10678952), (4, 5339476), (8, 2669738), (16, 1334869), (113, 189008), (226, 94504), (452, 47252), (904, 23626), (1808, 11813)]