21781060

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{155579}}^1$

素因数の和:155595

約数の個数: 24

約数和(自身を含む): 52274880

約数和(自身を除く): 30493820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 155579, 311158, 622316, 777895, 1089053, 1555790, 2178106, 3111580, 4356212, 5445265, 10890530, 21781060]

約数ペア:

[(1, 21781060), (2, 10890530), (4, 5445265), (5, 4356212), (7, 3111580), (10, 2178106), (14, 1555790), (20, 1089053), (28, 777895), (35, 622316), (70, 311158), (140, 155579)]