21268640

素因数分解:

$2^5\times 5^1\times {\mathrm{132929}}^1$

素因数の和:132944

約数の個数: 24

約数和(自身を含む): 50247540

約数和(自身を除く): 28978900

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 132929, 265858, 531716, 664645, 1063432, 1329290, 2126864, 2658580, 4253728, 5317160, 10634320, 21268640]

約数ペア:

[(1, 21268640), (2, 10634320), (4, 5317160), (5, 4253728), (8, 2658580), (10, 2126864), (16, 1329290), (20, 1063432), (32, 664645), (40, 531716), (80, 265858), (160, 132929)]