21050320

素因数分解:

$2^4\times 5^1\times {\mathrm{263129}}^1$

素因数の和:263142

約数の個数: 20

約数和(自身を含む): 48942180

約数和(自身を除く): 27891860

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263129, 526258, 1052516, 1315645, 2105032, 2631290, 4210064, 5262580, 10525160, 21050320]

約数ペア:

[(1, 21050320), (2, 10525160), (4, 5262580), (5, 4210064), (8, 2631290), (10, 2105032), (16, 1315645), (20, 1052516), (40, 526258), (80, 263129)]