78697640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{281063}}^1$

素因数の和:281081

約数の個数: 32

約数和(自身を含む): 202366080

約数和(自身を除く): 123668440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 281063, 562126, 1124252, 1405315, 1967441, 2248504, 2810630, 3934882, 5621260, 7869764, 9837205, 11242520, 15739528, 19674410, 39348820, 78697640]

約数ペア:

[(1, 78697640), (2, 39348820), (4, 19674410), (5, 15739528), (7, 11242520), (8, 9837205), (10, 7869764), (14, 5621260), (20, 3934882), (28, 2810630), (35, 2248504), (40, 1967441), (56, 1405315), (70, 1124252), (140, 562126), (280, 281063)]