21075815

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{227}}^1\times {\mathrm{599}}^1$

素因数の和:862

約数の個数: 16

約数和(自身を含む): 26265600

約数和(自身を除く): 5189785

約数列:

[1, 5, 31, 155, 227, 599, 1135, 2995, 7037, 18569, 35185, 92845, 135973, 679865, 4215163, 21075815]

約数ペア:

[(1, 21075815), (5, 4215163), (31, 679865), (155, 135973), (227, 92845), (599, 35185), (1135, 18569), (2995, 7037)]