20178513

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{599}}^1$

素因数の和:821

約数の個数: 24

約数和(自身を含む): 30888000

約数和(自身を除く): 10709487

約数列:

[1, 3, 9, 19, 57, 171, 197, 591, 599, 1773, 1797, 3743, 5391, 11229, 11381, 33687, 34143, 102429, 118003, 354009, 1062027, 2242057, 6726171, 20178513]

約数ペア:

[(1, 20178513), (3, 6726171), (9, 2242057), (19, 1062027), (57, 354009), (171, 118003), (197, 102429), (591, 34143), (599, 33687), (1773, 11381), (1797, 11229), (3743, 5391)]