21989585

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{4241}}^1$

素因数の和:4324

約数の個数: 16

約数和(自身を含む): 28404432

約数和(自身を除く): 6414847

約数列:

[1, 5, 17, 61, 85, 305, 1037, 4241, 5185, 21205, 72097, 258701, 360485, 1293505, 4397917, 21989585]

約数ペア:

[(1, 21989585), (5, 4397917), (17, 1293505), (61, 360485), (85, 258701), (305, 72097), (1037, 21205), (4241, 5185)]