21172280

素因数分解:

$2^3\times 5^1\times {\mathrm{529307}}^1$

素因数の和:529318

約数の個数: 16

約数和(自身を含む): 47637720

約数和(自身を除く): 26465440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 529307, 1058614, 2117228, 2646535, 4234456, 5293070, 10586140, 21172280]

約数ペア:

[(1, 21172280), (2, 10586140), (4, 5293070), (5, 4234456), (8, 2646535), (10, 2117228), (20, 1058614), (40, 529307)]