638960

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{163}}^1$

素因数の和:190

約数の個数: 60

約数和(自身を含む): 1738728

約数和(自身を除く): 1099768

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 163, 196, 245, 280, 326, 392, 490, 560, 652, 784, 815, 980, 1141, 1304, 1630, 1960, 2282, 2608, 3260, 3920, 4564, 5705, 6520, 7987, 9128, 11410, 13040, 15974, 18256, 22820, 31948, 39935, 45640, 63896, 79870, 91280, 127792, 159740, 319480, 638960]

約数ペア:

[(1, 638960), (2, 319480), (4, 159740), (5, 127792), (7, 91280), (8, 79870), (10, 63896), (14, 45640), (16, 39935), (20, 31948), (28, 22820), (35, 18256), (40, 15974), (49, 13040), (56, 11410), (70, 9128), (80, 7987), (98, 6520), (112, 5705), (140, 4564), (163, 3920), (196, 3260), (245, 2608), (280, 2282), (326, 1960), (392, 1630), (490, 1304), (560, 1141), (652, 980), (784, 815)]