18128720

素因数分解:

$2^4\times 5^1\times {\mathrm{226609}}^1$

素因数の和:226622

約数の個数: 20

約数和(自身を含む): 42149460

約数和(自身を除く): 24020740

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 226609, 453218, 906436, 1133045, 1812872, 2266090, 3625744, 4532180, 9064360, 18128720]

約数ペア:

[(1, 18128720), (2, 9064360), (4, 4532180), (5, 3625744), (8, 2266090), (10, 1812872), (16, 1133045), (20, 906436), (40, 453218), (80, 226609)]