81489215

素因数分解:

$5^1\times {\mathrm{97}}^1\times {\mathrm{401}}^1\times {\mathrm{419}}^1$

素因数の和:922

約数の個数: 16

約数和(自身を含む): 99277920

約数和(自身を除く): 17788705

約数列:

[1, 5, 97, 401, 419, 485, 2005, 2095, 38897, 40643, 168019, 194485, 203215, 840095, 16297843, 81489215]

約数ペア:

[(1, 81489215), (5, 16297843), (97, 840095), (401, 203215), (419, 194485), (485, 168019), (2005, 40643), (2095, 38897)]