20565980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{54121}}^1$

素因数の和:54149

約数の個数: 24

約数和(自身を含む): 45462480

約数和(自身を除く): 24896500

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 54121, 108242, 216484, 270605, 541210, 1028299, 1082420, 2056598, 4113196, 5141495, 10282990, 20565980]

約数ペア:

[(1, 20565980), (2, 10282990), (4, 5141495), (5, 4113196), (10, 2056598), (19, 1082420), (20, 1028299), (38, 541210), (76, 270605), (95, 216484), (190, 108242), (380, 54121)]