21778855

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{499}}^1$

素因数の和:583

約数の個数: 32

約数和(自身を含む): 31680000

約数和(自身を除く): 9901145

約数列:

[1, 5, 7, 29, 35, 43, 145, 203, 215, 301, 499, 1015, 1247, 1505, 2495, 3493, 6235, 8729, 14471, 17465, 21457, 43645, 72355, 101297, 107285, 150199, 506485, 622253, 750995, 3111265, 4355771, 21778855]

約数ペア:

[(1, 21778855), (5, 4355771), (7, 3111265), (29, 750995), (35, 622253), (43, 506485), (145, 150199), (203, 107285), (215, 101297), (301, 72355), (499, 43645), (1015, 21457), (1247, 17465), (1505, 14471), (2495, 8729), (3493, 6235)]