20552721

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{241}}^1$

素因数の和:413

約数の個数: 32

約数和(自身を含む): 32710656

約数和(自身を除く): 12157935

約数列:

[1, 3, 7, 21, 31, 93, 131, 217, 241, 393, 651, 723, 917, 1687, 2751, 4061, 5061, 7471, 12183, 22413, 28427, 31571, 52297, 85281, 94713, 156891, 220997, 662991, 978701, 2936103, 6850907, 20552721]

約数ペア:

[(1, 20552721), (3, 6850907), (7, 2936103), (21, 978701), (31, 662991), (93, 220997), (131, 156891), (217, 94713), (241, 85281), (393, 52297), (651, 31571), (723, 28427), (917, 22413), (1687, 12183), (2751, 7471), (4061, 5061)]