21225980

素因数分解:

$2^2\times 5^1\times {\mathrm{307}}^1\times {\mathrm{3457}}^1$

素因数の和:3773

約数の個数: 24

約数和(自身を含む): 44732688

約数和(自身を除く): 23506708

約数列:

[1, 2, 4, 5, 10, 20, 307, 614, 1228, 1535, 3070, 3457, 6140, 6914, 13828, 17285, 34570, 69140, 1061299, 2122598, 4245196, 5306495, 10612990, 21225980]

約数ペア:

[(1, 21225980), (2, 10612990), (4, 5306495), (5, 4245196), (10, 2122598), (20, 1061299), (307, 69140), (614, 34570), (1228, 17285), (1535, 13828), (3070, 6914), (3457, 6140)]