64512400

素因数分解:

$2^4\times 5^2\times {\mathrm{161281}}^1$

素因数の和:161299

約数の個数: 30

約数和(自身を含む): 154992002

約数和(自身を除く): 90479602

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 161281, 322562, 645124, 806405, 1290248, 1612810, 2580496, 3225620, 4032025, 6451240, 8064050, 12902480, 16128100, 32256200, 64512400]

約数ペア:

[(1, 64512400), (2, 32256200), (4, 16128100), (5, 12902480), (8, 8064050), (10, 6451240), (16, 4032025), (20, 3225620), (25, 2580496), (40, 1612810), (50, 1290248), (80, 806405), (100, 645124), (200, 322562), (400, 161281)]