278737620

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{663661}}^1$

素因数の和:663680

約数の個数: 48

約数和(自身を含む): 891961728

約数和(自身を除く): 613224108

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, 663661, 1327322, 1990983, 2654644, 3318305, 3981966, 4645627, 6636610, 7963932, 9291254, 9954915, 13273220, 13936881, 18582508, 19909830, 23228135, 27873762, 39819660, 46456270, 55747524, 69684405, 92912540, 139368810, 278737620]

約数ペア:

[(1, 278737620), (2, 139368810), (3, 92912540), (4, 69684405), (5, 55747524), (6, 46456270), (7, 39819660), (10, 27873762), (12, 23228135), (14, 19909830), (15, 18582508), (20, 13936881), (21, 13273220), (28, 9954915), (30, 9291254), (35, 7963932), (42, 6636610), (60, 4645627), (70, 3981966), (84, 3318305), (105, 2654644), (140, 1990983), (210, 1327322), (420, 663661)]