81122780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{213481}}^1$

素因数の和:213509

約数の個数: 24

約数和(自身を含む): 179324880

約数和(自身を除く): 98202100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 213481, 426962, 853924, 1067405, 2134810, 4056139, 4269620, 8112278, 16224556, 20280695, 40561390, 81122780]

約数ペア:

[(1, 81122780), (2, 40561390), (4, 20280695), (5, 16224556), (10, 8112278), (19, 4269620), (20, 4056139), (38, 2134810), (76, 1067405), (95, 853924), (190, 426962), (380, 213481)]