19965555

素因数分解:

$3^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{2083}}^1$

素因数の和:2168

約数の個数: 32

約数和(自身を含む): 36011520

約数和(自身を除く): 16045965

約数列:

[1, 3, 5, 9, 15, 27, 45, 71, 135, 213, 355, 639, 1065, 1917, 2083, 3195, 6249, 9585, 10415, 18747, 31245, 56241, 93735, 147893, 281205, 443679, 739465, 1331037, 2218395, 3993111, 6655185, 19965555]

約数ペア:

[(1, 19965555), (3, 6655185), (5, 3993111), (9, 2218395), (15, 1331037), (27, 739465), (45, 443679), (71, 281205), (135, 147893), (213, 93735), (355, 56241), (639, 31245), (1065, 18747), (1917, 10415), (2083, 9585), (3195, 6249)]