21231455

素因数分解:

$5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{4561}}^1$

素因数の和:4599

約数の個数: 24

約数和(自身を含む): 31204080

約数和(自身を除く): 9972625

約数列:

[1, 5, 7, 19, 35, 49, 95, 133, 245, 665, 931, 4561, 4655, 22805, 31927, 86659, 159635, 223489, 433295, 606613, 1117445, 3033065, 4246291, 21231455]

約数ペア:

[(1, 21231455), (5, 4246291), (7, 3033065), (19, 1117445), (35, 606613), (49, 433295), (95, 223489), (133, 159635), (245, 86659), (665, 31927), (931, 22805), (4561, 4655)]