19913515

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{4027}}^1$

素因数の和:4098

約数の個数: 16

約数和(自身を含む): 25521408

約数和(自身を除く): 5607893

約数列:

[1, 5, 23, 43, 115, 215, 989, 4027, 4945, 20135, 92621, 173161, 463105, 865805, 3982703, 19913515]

約数ペア:

[(1, 19913515), (5, 3982703), (23, 865805), (43, 463105), (115, 173161), (215, 92621), (989, 20135), (4027, 4945)]