21880105

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19801}}^1$

素因数の和:19836

約数の個数: 16

約数和(自身を含む): 29940624

約数和(自身を除く): 8060519

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 19801, 99005, 257413, 336617, 1287065, 1683085, 4376021, 21880105]

約数ペア:

[(1, 21880105), (5, 4376021), (13, 1683085), (17, 1287065), (65, 336617), (85, 257413), (221, 99005), (1105, 19801)]