21069140

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{24499}}^1$

素因数の和:24551

約数の個数: 24

約数和(自身を含む): 45276000

約数和(自身を除く): 24206860

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 24499, 48998, 97996, 122495, 244990, 489980, 1053457, 2106914, 4213828, 5267285, 10534570, 21069140]

約数ペア:

[(1, 21069140), (2, 10534570), (4, 5267285), (5, 4213828), (10, 2106914), (20, 1053457), (43, 489980), (86, 244990), (172, 122495), (215, 97996), (430, 48998), (860, 24499)]