20171221

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{1049}}^1$

素因数の和:1164

約数の個数: 16

約数和(自身を含む): 23990400

約数和(自身を除く): 3819179

約数列:

[1, 7, 41, 67, 287, 469, 1049, 2747, 7343, 19229, 43009, 70283, 301063, 491981, 2881603, 20171221]

約数ペア:

[(1, 20171221), (7, 2881603), (41, 491981), (67, 301063), (287, 70283), (469, 43009), (1049, 19229), (2747, 7343)]