21263375

素因数分解:

$5^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1279}}^1$

素因数の和:1320

約数の個数: 32

約数和(自身を含む): 31948800

約数和(自身を除く): 10685425

約数列:

[1, 5, 7, 19, 25, 35, 95, 125, 133, 175, 475, 665, 875, 1279, 2375, 3325, 6395, 8953, 16625, 24301, 31975, 44765, 121505, 159875, 170107, 223825, 607525, 850535, 1119125, 3037625, 4252675, 21263375]

約数ペア:

[(1, 21263375), (5, 4252675), (7, 3037625), (19, 1119125), (25, 850535), (35, 607525), (95, 223825), (125, 170107), (133, 159875), (175, 121505), (475, 44765), (665, 31975), (875, 24301), (1279, 16625), (2375, 8953), (3325, 6395)]