18887903997

素因数分解:

$3^1\times {\mathrm{157}}^1\times {\mathrm{647}}^1\times {\mathrm{61981}}^1$

素因数の和:62788

約数の個数: 16

約数和(自身を含む): 25383860352

約数和(自身を除く): 6495956355

約数列:

[1, 3, 157, 471, 647, 1941, 61981, 101579, 185943, 304737, 9731017, 29193051, 40101707, 120305121, 6295967999, 18887903997]

約数ペア:

[(1, 18887903997), (3, 6295967999), (157, 120305121), (471, 40101707), (647, 29193051), (1941, 9731017), (61981, 304737), (101579, 185943)]