21411560

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{3851}}^1$

素因数の和:4001

約数の個数: 32

約数和(自身を含む): 48535200

約数和(自身を除く): 27123640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 3851, 5560, 7702, 15404, 19255, 30808, 38510, 77020, 154040, 535289, 1070578, 2141156, 2676445, 4282312, 5352890, 10705780, 21411560]

約数ペア:

[(1, 21411560), (2, 10705780), (4, 5352890), (5, 4282312), (8, 2676445), (10, 2141156), (20, 1070578), (40, 535289), (139, 154040), (278, 77020), (556, 38510), (695, 30808), (1112, 19255), (1390, 15404), (2780, 7702), (3851, 5560)]