81355575

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{241}}^1\times {\mathrm{643}}^1$

素因数の和:904

約数の個数: 48

約数和(自身を含む): 154601216

約数和(自身を除く): 73245641

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 241, 525, 643, 723, 1205, 1687, 1929, 3215, 3615, 4501, 5061, 6025, 8435, 9645, 13503, 16075, 18075, 22505, 25305, 42175, 48225, 67515, 112525, 126525, 154963, 337575, 464889, 774815, 1084741, 2324445, 3254223, 3874075, 5423705, 11622225, 16271115, 27118525, 81355575]

約数ペア:

[(1, 81355575), (3, 27118525), (5, 16271115), (7, 11622225), (15, 5423705), (21, 3874075), (25, 3254223), (35, 2324445), (75, 1084741), (105, 774815), (175, 464889), (241, 337575), (525, 154963), (643, 126525), (723, 112525), (1205, 67515), (1687, 48225), (1929, 42175), (3215, 25305), (3615, 22505), (4501, 18075), (5061, 16075), (6025, 13503), (8435, 9645)]