20665615

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{2531}}^1$

素因数の和:2630

約数の個数: 16

約数和(自身を含む): 26251776

約数和(自身を除く): 5586161

約数列:

[1, 5, 23, 71, 115, 355, 1633, 2531, 8165, 12655, 58213, 179701, 291065, 898505, 4133123, 20665615]

約数ペア:

[(1, 20665615), (5, 4133123), (23, 898505), (71, 291065), (115, 179701), (355, 58213), (1633, 12655), (2531, 8165)]