21205535

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{1049}}^1$

素因数の和:1378

約数の個数: 16

約数和(自身を含む): 27518400

約数和(自身を除く): 6312865

約数列:

[1, 5, 13, 65, 311, 1049, 1555, 4043, 5245, 13637, 20215, 68185, 326239, 1631195, 4241107, 21205535]

約数ペア:

[(1, 21205535), (5, 4241107), (13, 1631195), (65, 326239), (311, 68185), (1049, 20215), (1555, 13637), (4043, 5245)]