20644540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{167}}^1\times {\mathrm{883}}^1$

素因数の和:1066

約数の個数: 48

約数和(自身を含む): 49900032

約数和(自身を除く): 29255492

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 167, 334, 668, 835, 883, 1169, 1670, 1766, 2338, 3340, 3532, 4415, 4676, 5845, 6181, 8830, 11690, 12362, 17660, 23380, 24724, 30905, 61810, 123620, 147461, 294922, 589844, 737305, 1032227, 1474610, 2064454, 2949220, 4128908, 5161135, 10322270, 20644540]

約数ペア:

[(1, 20644540), (2, 10322270), (4, 5161135), (5, 4128908), (7, 2949220), (10, 2064454), (14, 1474610), (20, 1032227), (28, 737305), (35, 589844), (70, 294922), (140, 147461), (167, 123620), (334, 61810), (668, 30905), (835, 24724), (883, 23380), (1169, 17660), (1670, 12362), (1766, 11690), (2338, 8830), (3340, 6181), (3532, 5845), (4415, 4676)]