20764215

素因数分解:

$3^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{4157}}^1$

素因数の和:4208

約数の個数: 32

約数和(自身を含む): 37920960

約数和(自身を除く): 17156745

約数列:

[1, 3, 5, 9, 15, 27, 37, 45, 111, 135, 185, 333, 555, 999, 1665, 4157, 4995, 12471, 20785, 37413, 62355, 112239, 153809, 187065, 461427, 561195, 769045, 1384281, 2307135, 4152843, 6921405, 20764215]

約数ペア:

[(1, 20764215), (3, 6921405), (5, 4152843), (9, 2307135), (15, 1384281), (27, 769045), (37, 561195), (45, 461427), (111, 187065), (135, 153809), (185, 112239), (333, 62355), (555, 37413), (999, 20785), (1665, 12471), (4157, 4995)]