19986020

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{5521}}^1$

素因数の和:5711

約数の個数: 24

約数和(自身を含む): 42210168

約数和(自身を除く): 22224148

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 5521, 11042, 22084, 27605, 55210, 110420, 999301, 1998602, 3997204, 4996505, 9993010, 19986020]

約数ペア:

[(1, 19986020), (2, 9993010), (4, 4996505), (5, 3997204), (10, 1998602), (20, 999301), (181, 110420), (362, 55210), (724, 27605), (905, 22084), (1810, 11042), (3620, 5521)]