19991013

素因数分解:

$3^1\times 7^1\times {\mathrm{229}}^1\times {\mathrm{4157}}^1$

素因数の和:4396

約数の個数: 16

約数和(自身を含む): 30602880

約数和(自身を除く): 10611867

約数列:

[1, 3, 7, 21, 229, 687, 1603, 4157, 4809, 12471, 29099, 87297, 951953, 2855859, 6663671, 19991013]

約数ペア:

[(1, 19991013), (3, 6663671), (7, 2855859), (21, 951953), (229, 87297), (687, 29099), (1603, 12471), (4157, 4809)]