21142820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55639}}^1$

素因数の和:55667

約数の個数: 24

約数和(自身を含む): 46737600

約数和(自身を除く): 25594780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55639, 111278, 222556, 278195, 556390, 1057141, 1112780, 2114282, 4228564, 5285705, 10571410, 21142820]

約数ペア:

[(1, 21142820), (2, 10571410), (4, 5285705), (5, 4228564), (10, 2114282), (19, 1112780), (20, 1057141), (38, 556390), (76, 278195), (95, 222556), (190, 111278), (380, 55639)]