19995185

素因数分解:

$5^1\times 7^3\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:246

約数の個数: 32

約数和(自身を含む): 28512000

約数和(自身を除く): 8516815

約数列:

[1, 5, 7, 35, 49, 89, 131, 245, 343, 445, 623, 655, 917, 1715, 3115, 4361, 4585, 6419, 11659, 21805, 30527, 32095, 44933, 58295, 81613, 152635, 224665, 408065, 571291, 2856455, 3999037, 19995185]

約数ペア:

[(1, 19995185), (5, 3999037), (7, 2856455), (35, 571291), (49, 408065), (89, 224665), (131, 152635), (245, 81613), (343, 58295), (445, 44933), (623, 32095), (655, 30527), (917, 21805), (1715, 11659), (3115, 6419), (4361, 4585)]