20389505

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{1259}}^1$

素因数の和:1384

約数の個数: 16

約数和(自身を含む): 25401600

約数和(自身を除く): 5012095

約数列:

[1, 5, 41, 79, 205, 395, 1259, 3239, 6295, 16195, 51619, 99461, 258095, 497305, 4077901, 20389505]

約数ペア:

[(1, 20389505), (5, 4077901), (41, 497305), (79, 258095), (205, 99461), (395, 51619), (1259, 16195), (3239, 6295)]