78561620

素因数分解:

$2^2\times 5^1\times {\mathrm{443}}^1\times {\mathrm{8867}}^1$

素因数の和:9319

約数の個数: 24

約数和(自身を含む): 165370464

約数和(自身を除く): 86808844

約数列:

[1, 2, 4, 5, 10, 20, 443, 886, 1772, 2215, 4430, 8860, 8867, 17734, 35468, 44335, 88670, 177340, 3928081, 7856162, 15712324, 19640405, 39280810, 78561620]

約数ペア:

[(1, 78561620), (2, 39280810), (4, 19640405), (5, 15712324), (10, 7856162), (20, 3928081), (443, 177340), (886, 88670), (1772, 44335), (2215, 35468), (4430, 17734), (8860, 8867)]