21728525

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{9551}}^1$

素因数の和:9581

約数の個数: 24

約数和(自身を含む): 33164544

約数和(自身を除く): 11436019

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 175, 325, 455, 2275, 9551, 47755, 66857, 124163, 238775, 334285, 620815, 869141, 1671425, 3104075, 4345705, 21728525]

約数ペア:

[(1, 21728525), (5, 4345705), (7, 3104075), (13, 1671425), (25, 869141), (35, 620815), (65, 334285), (91, 238775), (175, 124163), (325, 66857), (455, 47755), (2275, 9551)]