20819421

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{17393}}^1$

素因数の和:17425

約数の個数: 24

約数和(自身を含む): 36179520

約数和(自身を除く): 15360099

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 17393, 52179, 121751, 156537, 330467, 365253, 991401, 1095759, 2313269, 2974203, 6939807, 20819421]

約数ペア:

[(1, 20819421), (3, 6939807), (7, 2974203), (9, 2313269), (19, 1095759), (21, 991401), (57, 365253), (63, 330467), (133, 156537), (171, 121751), (399, 52179), (1197, 17393)]