20872400

素因数分解:

$2^4\times 5^2\times {\mathrm{52181}}^1$

素因数の和:52199

約数の個数: 30

約数和(自身を含む): 50146902

約数和(自身を除く): 29274502

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 52181, 104362, 208724, 260905, 417448, 521810, 834896, 1043620, 1304525, 2087240, 2609050, 4174480, 5218100, 10436200, 20872400]

約数ペア:

[(1, 20872400), (2, 10436200), (4, 5218100), (5, 4174480), (8, 2609050), (10, 2087240), (16, 1304525), (20, 1043620), (25, 834896), (40, 521810), (50, 417448), (80, 260905), (100, 208724), (200, 104362), (400, 52181)]