21506980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{3371}}^1$

素因数の和:3420

約数の個数: 48

約数和(自身を含む): 50984640

約数和(自身を除く): 29477660

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 29, 44, 55, 58, 110, 116, 145, 220, 290, 319, 580, 638, 1276, 1595, 3190, 3371, 6380, 6742, 13484, 16855, 33710, 37081, 67420, 74162, 97759, 148324, 185405, 195518, 370810, 391036, 488795, 741620, 977590, 1075349, 1955180, 2150698, 4301396, 5376745, 10753490, 21506980]

約数ペア:

[(1, 21506980), (2, 10753490), (4, 5376745), (5, 4301396), (10, 2150698), (11, 1955180), (20, 1075349), (22, 977590), (29, 741620), (44, 488795), (55, 391036), (58, 370810), (110, 195518), (116, 185405), (145, 148324), (220, 97759), (290, 74162), (319, 67420), (580, 37081), (638, 33710), (1276, 16855), (1595, 13484), (3190, 6742), (3371, 6380)]