20398581

素因数分解:

$3^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{2917}}^1$

素因数の和:2970

約数の個数: 32

約数和(自身を含む): 35482880

約数和(自身を除く): 15084299

約数列:

[1, 3, 7, 9, 21, 27, 37, 63, 111, 189, 259, 333, 777, 999, 2331, 2917, 6993, 8751, 20419, 26253, 61257, 78759, 107929, 183771, 323787, 551313, 755503, 971361, 2266509, 2914083, 6799527, 20398581]

約数ペア:

[(1, 20398581), (3, 6799527), (7, 2914083), (9, 2266509), (21, 971361), (27, 755503), (37, 551313), (63, 323787), (111, 183771), (189, 107929), (259, 78759), (333, 61257), (777, 26253), (999, 20419), (2331, 8751), (2917, 6993)]