20687485

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2393}}^1$

素因数の和:2437

約数の個数: 32

約数和(自身を含む): 32175360

約数和(自身を除く): 11487875

約数列:

[1, 5, 7, 13, 19, 35, 65, 91, 95, 133, 247, 455, 665, 1235, 1729, 2393, 8645, 11965, 16751, 31109, 45467, 83755, 155545, 217763, 227335, 318269, 591071, 1088815, 1591345, 2955355, 4137497, 20687485]

約数ペア:

[(1, 20687485), (5, 4137497), (7, 2955355), (13, 1591345), (19, 1088815), (35, 591071), (65, 318269), (91, 227335), (95, 217763), (133, 155545), (247, 83755), (455, 45467), (665, 31109), (1235, 16751), (1729, 11965), (2393, 8645)]