80561620

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{28979}}^1$

素因数の和:29127

約数の個数: 24

約数和(自身を含む): 170402400

約数和(自身を除く): 89840780

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 28979, 57958, 115916, 144895, 289790, 579580, 4028081, 8056162, 16112324, 20140405, 40280810, 80561620]

約数ペア:

[(1, 80561620), (2, 40280810), (4, 20140405), (5, 16112324), (10, 8056162), (20, 4028081), (139, 579580), (278, 289790), (556, 144895), (695, 115916), (1390, 57958), (2780, 28979)]