279442040

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{17959}}^1$

素因数の和:18359

約数の個数: 32

約数和(自身を含む): 630396000

約数和(自身を除く): 350953960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1556, 1945, 3112, 3890, 7780, 15560, 17959, 35918, 71836, 89795, 143672, 179590, 359180, 718360, 6986051, 13972102, 27944204, 34930255, 55888408, 69860510, 139721020, 279442040]

約数ペア:

[(1, 279442040), (2, 139721020), (4, 69860510), (5, 55888408), (8, 34930255), (10, 27944204), (20, 13972102), (40, 6986051), (389, 718360), (778, 359180), (1556, 179590), (1945, 143672), (3112, 89795), (3890, 71836), (7780, 35918), (15560, 17959)]