89810020

素因数分解:

$2^2\times 5^1\times {\mathrm{499}}^1\times {\mathrm{8999}}^1$

素因数の和:9507

約数の個数: 24

約数和(自身を含む): 189000000

約数和(自身を除く): 99189980

約数列:

[1, 2, 4, 5, 10, 20, 499, 998, 1996, 2495, 4990, 8999, 9980, 17998, 35996, 44995, 89990, 179980, 4490501, 8981002, 17962004, 22452505, 44905010, 89810020]

約数ペア:

[(1, 89810020), (2, 44905010), (4, 22452505), (5, 17962004), (10, 8981002), (20, 4490501), (499, 179980), (998, 89990), (1996, 44995), (2495, 35996), (4990, 17998), (8999, 9980)]