20990585

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{54521}}^1$

素因数の和:54544

約数の個数: 16

約数和(自身を含む): 31404672

約数和(自身を除く): 10414087

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 54521, 272605, 381647, 599731, 1908235, 2998655, 4198117, 20990585]

約数ペア:

[(1, 20990585), (5, 4198117), (7, 2998655), (11, 1908235), (35, 599731), (55, 381647), (77, 272605), (385, 54521)]