128656340

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{378401}}^1$

素因数の和:378427

約数の個数: 24

約数和(自身を含む): 286071912

約数和(自身を除く): 157415572

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 378401, 756802, 1513604, 1892005, 3784010, 6432817, 7568020, 12865634, 25731268, 32164085, 64328170, 128656340]

約数ペア:

[(1, 128656340), (2, 64328170), (4, 32164085), (5, 25731268), (10, 12865634), (17, 7568020), (20, 6432817), (34, 3784010), (68, 1892005), (85, 1513604), (170, 756802), (340, 378401)]