21122675

素因数分解:

$5^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{401}}^1$

素因数の和:468

約数の個数: 36

約数和(自身を含む): 31254696

約数和(自身を除く): 10132021

約数列:

[1, 5, 7, 25, 35, 43, 49, 175, 215, 245, 301, 401, 1075, 1225, 1505, 2005, 2107, 2807, 7525, 10025, 10535, 14035, 17243, 19649, 52675, 70175, 86215, 98245, 120701, 431075, 491225, 603505, 844907, 3017525, 4224535, 21122675]

約数ペア:

[(1, 21122675), (5, 4224535), (7, 3017525), (25, 844907), (35, 603505), (43, 491225), (49, 431075), (175, 120701), (215, 98245), (245, 86215), (301, 70175), (401, 52675), (1075, 19649), (1225, 17243), (1505, 14035), (2005, 10535), (2107, 10025), (2807, 7525)]