20921499

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{1129}}^1$

素因数の和:1235

約数の個数: 24

約数和(自身を含む): 31730400

約数和(自身を除く): 10808901

約数列:

[1, 3, 9, 29, 71, 87, 213, 261, 639, 1129, 2059, 3387, 6177, 10161, 18531, 32741, 80159, 98223, 240477, 294669, 721431, 2324611, 6973833, 20921499]

約数ペア:

[(1, 20921499), (3, 6973833), (9, 2324611), (29, 721431), (71, 294669), (87, 240477), (213, 98223), (261, 80159), (639, 32741), (1129, 18531), (2059, 10161), (3387, 6177)]