81464721

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1\times {\mathrm{193}}^1$

素因数の和:425

約数の個数: 32

約数和(自身を含む): 119938560

約数和(自身を除く): 38473839

約数列:

[1, 3, 13, 39, 79, 137, 193, 237, 411, 579, 1027, 1781, 2509, 3081, 5343, 7527, 10823, 15247, 26441, 32469, 45741, 79323, 140699, 198211, 343733, 422097, 594633, 1031199, 2088839, 6266517, 27154907, 81464721]

約数ペア:

[(1, 81464721), (3, 27154907), (13, 6266517), (39, 2088839), (79, 1031199), (137, 594633), (193, 422097), (237, 343733), (411, 198211), (579, 140699), (1027, 79323), (1781, 45741), (2509, 32469), (3081, 26441), (5343, 15247), (7527, 10823)]