1285128880

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{327839}}^1$

素因数の和:327866

約数の個数: 60

約数和(自身を含む): 3475759680

約数和(自身を除く): 2190630800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 327839, 655678, 1311356, 1639195, 2294873, 2622712, 3278390, 4589746, 5245424, 6556780, 9179492, 11474365, 13113560, 16064111, 18358984, 22948730, 26227120, 32128222, 36717968, 45897460, 64256444, 80320555, 91794920, 128512888, 160641110, 183589840, 257025776, 321282220, 642564440, 1285128880]

約数ペア:

[(1, 1285128880), (2, 642564440), (4, 321282220), (5, 257025776), (7, 183589840), (8, 160641110), (10, 128512888), (14, 91794920), (16, 80320555), (20, 64256444), (28, 45897460), (35, 36717968), (40, 32128222), (49, 26227120), (56, 22948730), (70, 18358984), (80, 16064111), (98, 13113560), (112, 11474365), (140, 9179492), (196, 6556780), (245, 5245424), (280, 4589746), (392, 3278390), (490, 2622712), (560, 2294873), (784, 1639195), (980, 1311356), (1960, 655678), (3920, 327839)]