209908020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{499781}}^1$

素因数の和:499800

約数の個数: 48

約数和(自身を含む): 671707008

約数和(自身を除く): 461798988

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 499781, 999562, 1499343, 1999124, 2498905, 2998686, 3498467, 4997810, 5997372, 6996934, 7496715, 9995620, 10495401, 13993868, 14993430, 17492335, 20990802, 29986860, 34984670, 41981604, 52477005, 69969340, 104954010, 209908020]

約数ペア:

[(1, 209908020), (2, 104954010), (3, 69969340), (4, 52477005), (5, 41981604), (6, 34984670), (7, 29986860), (10, 20990802), (12, 17492335), (14, 14993430), (15, 13993868), (20, 10495401), (21, 9995620), (28, 7496715), (30, 6996934), (35, 5997372), (42, 4997810), (60, 3498467), (70, 2998686), (84, 2498905), (105, 1999124), (140, 1499343), (210, 999562), (420, 499781)]