81131590

素因数分解:

$2^1\times 5^1\times {\mathrm{439}}^1\times {\mathrm{18481}}^1$

素因数の和:18927

約数の個数: 16

約数和(自身を含む): 146377440

約数和(自身を除く): 65245850

約数列:

[1, 2, 5, 10, 439, 878, 2195, 4390, 18481, 36962, 92405, 184810, 8113159, 16226318, 40565795, 81131590]

約数ペア:

[(1, 81131590), (2, 40565795), (5, 16226318), (10, 8113159), (439, 184810), (878, 92405), (2195, 36962), (4390, 18481)]