21243580

素因数分解:

$2^2\times 5^1\times {\mathrm{331}}^1\times {\mathrm{3209}}^1$

素因数の和:3549

約数の個数: 24

約数和(自身を含む): 44760240

約数和(自身を除く): 23516660

約数列:

[1, 2, 4, 5, 10, 20, 331, 662, 1324, 1655, 3209, 3310, 6418, 6620, 12836, 16045, 32090, 64180, 1062179, 2124358, 4248716, 5310895, 10621790, 21243580]

約数ペア:

[(1, 21243580), (2, 10621790), (4, 5310895), (5, 4248716), (10, 2124358), (20, 1062179), (331, 64180), (662, 32090), (1324, 16045), (1655, 12836), (3209, 6620), (3310, 6418)]