21386260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{883}}^1$

素因数の和:1072

約数の個数: 48

約数和(自身を含む): 51682176

約数和(自身を除く): 30295916

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 173, 346, 692, 865, 883, 1211, 1730, 1766, 2422, 3460, 3532, 4415, 4844, 6055, 6181, 8830, 12110, 12362, 17660, 24220, 24724, 30905, 61810, 123620, 152759, 305518, 611036, 763795, 1069313, 1527590, 2138626, 3055180, 4277252, 5346565, 10693130, 21386260]

約数ペア:

[(1, 21386260), (2, 10693130), (4, 5346565), (5, 4277252), (7, 3055180), (10, 2138626), (14, 1527590), (20, 1069313), (28, 763795), (35, 611036), (70, 305518), (140, 152759), (173, 123620), (346, 61810), (692, 30905), (865, 24724), (883, 24220), (1211, 17660), (1730, 12362), (1766, 12110), (2422, 8830), (3460, 6181), (3532, 6055), (4415, 4844)]