643048205

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{349}}^1\times {\mathrm{409}}^1$

素因数の和:833

約数の個数: 32

約数和(自身を含む): 836892000

約数和(自身を除く): 193843795

約数列:

[1, 5, 17, 53, 85, 265, 349, 409, 901, 1745, 2045, 4505, 5933, 6953, 18497, 21677, 29665, 34765, 92485, 108385, 142741, 314449, 368509, 713705, 1572245, 1842545, 2426597, 7565273, 12132985, 37826365, 128609641, 643048205]

約数ペア:

[(1, 643048205), (5, 128609641), (17, 37826365), (53, 12132985), (85, 7565273), (265, 2426597), (349, 1842545), (409, 1572245), (901, 713705), (1745, 368509), (2045, 314449), (4505, 142741), (5933, 108385), (6953, 92485), (18497, 34765), (21677, 29665)]