21721775

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{1021}}^1$

素因数の和:1091

約数の個数: 24

約数和(自身を含む): 28893984

約数和(自身を除く): 7172209

約数列:

[1, 5, 23, 25, 37, 115, 185, 575, 851, 925, 1021, 4255, 5105, 21275, 23483, 25525, 37777, 117415, 188885, 587075, 868871, 944425, 4344355, 21721775]

約数ペア:

[(1, 21721775), (5, 4344355), (23, 944425), (25, 868871), (37, 587075), (115, 188885), (185, 117415), (575, 37777), (851, 25525), (925, 23483), (1021, 21275), (4255, 5105)]