21668090

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^2\times {\mathrm{1289}}^1$

素因数の和:1378

約数の個数: 24

約数和(自身を含む): 40008060

約数和(自身を除く): 18339970

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 1289, 1681, 2578, 3362, 6445, 8405, 12890, 16810, 52849, 105698, 264245, 528490, 2166809, 4333618, 10834045, 21668090]

約数ペア:

[(1, 21668090), (2, 10834045), (5, 4333618), (10, 2166809), (41, 528490), (82, 264245), (205, 105698), (410, 52849), (1289, 16810), (1681, 12890), (2578, 8405), (3362, 6445)]