81620860

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{31153}}^1$

素因数の和:31293

約数の個数: 24

約数和(自身を含む): 172717776

約数和(自身を除く): 91096916

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 31153, 62306, 124612, 155765, 311530, 623060, 4081043, 8162086, 16324172, 20405215, 40810430, 81620860]

約数ペア:

[(1, 81620860), (2, 40810430), (4, 20405215), (5, 16324172), (10, 8162086), (20, 4081043), (131, 623060), (262, 311530), (524, 155765), (655, 124612), (1310, 62306), (2620, 31153)]