128289640

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{74587}}^1$

素因数の和:74641

約数の個数: 32

約数和(自身を含む): 295368480

約数和(自身を除く): 167078840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 74587, 149174, 298348, 372935, 596696, 745870, 1491740, 2983480, 3207241, 6414482, 12828964, 16036205, 25657928, 32072410, 64144820, 128289640]

約数ペア:

[(1, 128289640), (2, 64144820), (4, 32072410), (5, 25657928), (8, 16036205), (10, 12828964), (20, 6414482), (40, 3207241), (43, 2983480), (86, 1491740), (172, 745870), (215, 596696), (344, 372935), (430, 298348), (860, 149174), (1720, 74587)]