664720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{1187}}^1$

素因数の和:1207

約数の個数: 40

約数和(自身を含む): 1767744

約数和(自身を除く): 1103024

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 1187, 2374, 4748, 5935, 8309, 9496, 11870, 16618, 18992, 23740, 33236, 41545, 47480, 66472, 83090, 94960, 132944, 166180, 332360, 664720]

約数ペア:

[(1, 664720), (2, 332360), (4, 166180), (5, 132944), (7, 94960), (8, 83090), (10, 66472), (14, 47480), (16, 41545), (20, 33236), (28, 23740), (35, 18992), (40, 16618), (56, 11870), (70, 9496), (80, 8309), (112, 5935), (140, 4748), (280, 2374), (560, 1187)]