20423745

素因数分解:

$3^4\times 5^1\times {\mathrm{211}}^1\times {\mathrm{239}}^1$

素因数の和:467

約数の個数: 40

約数和(自身を含む): 36938880

約数和(自身を除く): 16515135

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 211, 239, 405, 633, 717, 1055, 1195, 1899, 2151, 3165, 3585, 5697, 6453, 9495, 10755, 17091, 19359, 28485, 32265, 50429, 85455, 96795, 151287, 252145, 453861, 756435, 1361583, 2269305, 4084749, 6807915, 20423745]

約数ペア:

[(1, 20423745), (3, 6807915), (5, 4084749), (9, 2269305), (15, 1361583), (27, 756435), (45, 453861), (81, 252145), (135, 151287), (211, 96795), (239, 85455), (405, 50429), (633, 32265), (717, 28485), (1055, 19359), (1195, 17091), (1899, 10755), (2151, 9495), (3165, 6453), (3585, 5697)]