21611020

素因数分解:

$2^2\times 5^1\times {\mathrm{787}}^1\times {\mathrm{1373}}^1$

素因数の和:2169

約数の個数: 24

約数和(自身を含む): 45473904

約数和(自身を除く): 23862884

約数列:

[1, 2, 4, 5, 10, 20, 787, 1373, 1574, 2746, 3148, 3935, 5492, 6865, 7870, 13730, 15740, 27460, 1080551, 2161102, 4322204, 5402755, 10805510, 21611020]

約数ペア:

[(1, 21611020), (2, 10805510), (4, 5402755), (5, 4322204), (10, 2161102), (20, 1080551), (787, 27460), (1373, 15740), (1574, 13730), (2746, 7870), (3148, 6865), (3935, 5492)]