81731018

素因数分解:

$2^1\times {\mathrm{101}}^1\times {\mathrm{401}}^1\times {\mathrm{1009}}^1$

素因数の和:1513

約数の個数: 16

約数和(自身を含む): 124242120

約数和(自身を除く): 42511102

約数列:

[1, 2, 101, 202, 401, 802, 1009, 2018, 40501, 81002, 101909, 203818, 404609, 809218, 40865509, 81731018]

約数ペア:

[(1, 81731018), (2, 40865509), (101, 809218), (202, 404609), (401, 203818), (802, 101909), (1009, 81002), (2018, 40501)]