21284720

素因数分解:

$2^4\times 5^1\times {\mathrm{266059}}^1$

素因数の和:266072

約数の個数: 20

約数和(自身を含む): 49487160

約数和(自身を除く): 28202440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266059, 532118, 1064236, 1330295, 2128472, 2660590, 4256944, 5321180, 10642360, 21284720]

約数ペア:

[(1, 21284720), (2, 10642360), (4, 5321180), (5, 4256944), (8, 2660590), (10, 2128472), (16, 1330295), (20, 1064236), (40, 532118), (80, 266059)]