21147556

素因数分解:

$2^2\times {\mathrm{47}}^1\times {\mathrm{197}}^1\times {\mathrm{571}}^1$

素因数の和:819

約数の個数: 24

約数和(自身を含む): 38054016

約数和(自身を除く): 16906460

約数列:

[1, 2, 4, 47, 94, 188, 197, 394, 571, 788, 1142, 2284, 9259, 18518, 26837, 37036, 53674, 107348, 112487, 224974, 449948, 5286889, 10573778, 21147556]

約数ペア:

[(1, 21147556), (2, 10573778), (4, 5286889), (47, 449948), (94, 224974), (188, 112487), (197, 107348), (394, 53674), (571, 37036), (788, 26837), (1142, 18518), (2284, 9259)]