20398780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53681}}^1$

素因数の和:53709

約数の個数: 24

約数和(自身を含む): 45092880

約数和(自身を除く): 24694100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 53681, 107362, 214724, 268405, 536810, 1019939, 1073620, 2039878, 4079756, 5099695, 10199390, 20398780]

約数ペア:

[(1, 20398780), (2, 10199390), (4, 5099695), (5, 4079756), (10, 2039878), (19, 1073620), (20, 1019939), (38, 536810), (76, 268405), (95, 214724), (190, 107362), (380, 53681)]