20379905

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{953}}^1$

素因数の和:1025

約数の個数: 32

約数和(自身を含む): 30772224

約数和(自身を除く): 10392319

約数列:

[1, 5, 7, 13, 35, 47, 65, 91, 235, 329, 455, 611, 953, 1645, 3055, 4277, 4765, 6671, 12389, 21385, 33355, 44791, 61945, 86723, 223955, 313537, 433615, 582283, 1567685, 2911415, 4075981, 20379905]

約数ペア:

[(1, 20379905), (5, 4075981), (7, 2911415), (13, 1567685), (35, 582283), (47, 433615), (65, 313537), (91, 223955), (235, 86723), (329, 61945), (455, 44791), (611, 33355), (953, 21385), (1645, 12389), (3055, 6671), (4277, 4765)]