64768400

素因数分解:

$2^4\times 5^2\times {\mathrm{161921}}^1$

素因数の和:161939

約数の個数: 30

約数和(自身を含む): 155607042

約数和(自身を除く): 90838642

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 161921, 323842, 647684, 809605, 1295368, 1619210, 2590736, 3238420, 4048025, 6476840, 8096050, 12953680, 16192100, 32384200, 64768400]

約数ペア:

[(1, 64768400), (2, 32384200), (4, 16192100), (5, 12953680), (8, 8096050), (10, 6476840), (16, 4048025), (20, 3238420), (25, 2590736), (40, 1619210), (50, 1295368), (80, 809605), (100, 647684), (200, 323842), (400, 161921)]