20572605

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:266

約数の個数: 48

約数和(自身を含む): 37200384

約数和(自身を除く): 16627779

約数列:

[1, 3, 5, 9, 15, 45, 47, 71, 137, 141, 213, 235, 355, 411, 423, 639, 685, 705, 1065, 1233, 2055, 2115, 3195, 3337, 6165, 6439, 9727, 10011, 16685, 19317, 29181, 30033, 32195, 48635, 50055, 57951, 87543, 96585, 145905, 150165, 289755, 437715, 457169, 1371507, 2285845, 4114521, 6857535, 20572605]

約数ペア:

[(1, 20572605), (3, 6857535), (5, 4114521), (9, 2285845), (15, 1371507), (45, 457169), (47, 437715), (71, 289755), (137, 150165), (141, 145905), (213, 96585), (235, 87543), (355, 57951), (411, 50055), (423, 48635), (639, 32195), (685, 30033), (705, 29181), (1065, 19317), (1233, 16685), (2055, 10011), (2115, 9727), (3195, 6439), (3337, 6165)]