21303280

素因数分解:

$2^4\times 5^1\times {\mathrm{266291}}^1$

素因数の和:266304

約数の個数: 20

約数和(自身を含む): 49530312

約数和(自身を除く): 28227032

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266291, 532582, 1065164, 1331455, 2130328, 2662910, 4260656, 5325820, 10651640, 21303280]

約数ペア:

[(1, 21303280), (2, 10651640), (4, 5325820), (5, 4260656), (8, 2662910), (10, 2130328), (16, 1331455), (20, 1065164), (40, 532582), (80, 266291)]