81898100

素因数分解:

$2^2\times 5^2\times {\mathrm{509}}^1\times {\mathrm{1609}}^1$

素因数の和:2132

約数の個数: 36

約数和(自身を含む): 178178700

約数和(自身を除く): 96280600

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 509, 1018, 1609, 2036, 2545, 3218, 5090, 6436, 8045, 10180, 12725, 16090, 25450, 32180, 40225, 50900, 80450, 160900, 818981, 1637962, 3275924, 4094905, 8189810, 16379620, 20474525, 40949050, 81898100]

約数ペア:

[(1, 81898100), (2, 40949050), (4, 20474525), (5, 16379620), (10, 8189810), (20, 4094905), (25, 3275924), (50, 1637962), (100, 818981), (509, 160900), (1018, 80450), (1609, 50900), (2036, 40225), (2545, 32180), (3218, 25450), (5090, 16090), (6436, 12725), (8045, 10180)]