21071755

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{1579}}^1$

素因数の和:1758

約数の個数: 16

約数和(自身を含む): 26961120

約数和(自身を除く): 5889365

約数列:

[1, 5, 17, 85, 157, 785, 1579, 2669, 7895, 13345, 26843, 134215, 247903, 1239515, 4214351, 21071755]

約数ペア:

[(1, 21071755), (5, 4214351), (17, 1239515), (85, 247903), (157, 134215), (785, 26843), (1579, 13345), (2669, 7895)]