20129915

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{181}}^1$

素因数の和:287

約数の個数: 32

約数和(自身を含む): 27518400

約数和(自身を除く): 7388485

約数列:

[1, 5, 13, 29, 59, 65, 145, 181, 295, 377, 767, 905, 1711, 1885, 2353, 3835, 5249, 8555, 10679, 11765, 22243, 26245, 53395, 68237, 111215, 138827, 309691, 341185, 694135, 1548455, 4025983, 20129915]

約数ペア:

[(1, 20129915), (5, 4025983), (13, 1548455), (29, 694135), (59, 341185), (65, 309691), (145, 138827), (181, 111215), (295, 68237), (377, 53395), (767, 26245), (905, 22243), (1711, 11765), (1885, 10679), (2353, 8555), (3835, 5249)]