81396620

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{140339}}^1$

素因数の和:140377

約数の個数: 24

約数和(自身を含む): 176828400

約数和(自身を除く): 95431780

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 140339, 280678, 561356, 701695, 1403390, 2806780, 4069831, 8139662, 16279324, 20349155, 40698310, 81396620]

約数ペア:

[(1, 81396620), (2, 40698310), (4, 20349155), (5, 16279324), (10, 8139662), (20, 4069831), (29, 2806780), (58, 1403390), (116, 701695), (145, 561356), (290, 280678), (580, 140339)]