20356405

素因数分解:

$5^1\times {\mathrm{29}}^2\times {\mathrm{47}}^1\times {\mathrm{103}}^1$

素因数の和:213

約数の個数: 24

約数和(自身を含む): 26088192

約数和(自身を除く): 5731787

約数列:

[1, 5, 29, 47, 103, 145, 235, 515, 841, 1363, 2987, 4205, 4841, 6815, 14935, 24205, 39527, 86623, 140389, 197635, 433115, 701945, 4071281, 20356405]

約数ペア:

[(1, 20356405), (5, 4071281), (29, 701945), (47, 433115), (103, 197635), (145, 140389), (235, 86623), (515, 39527), (841, 24205), (1363, 14935), (2987, 6815), (4205, 4841)]