28780353

素因数分解:

$3^4\times 7^1\times {\mathrm{193}}^1\times {\mathrm{263}}^1$

素因数の和:475

約数の個数: 40

約数和(自身を含む): 49577088

約数和(自身を除く): 20796735

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 193, 263, 567, 579, 789, 1351, 1737, 1841, 2367, 4053, 5211, 5523, 7101, 12159, 15633, 16569, 21303, 36477, 49707, 50759, 109431, 149121, 152277, 355313, 456831, 1065939, 1370493, 3197817, 4111479, 9593451, 28780353]

約数ペア:

[(1, 28780353), (3, 9593451), (7, 4111479), (9, 3197817), (21, 1370493), (27, 1065939), (63, 456831), (81, 355313), (189, 152277), (193, 149121), (263, 109431), (567, 50759), (579, 49707), (789, 36477), (1351, 21303), (1737, 16569), (1841, 15633), (2367, 12159), (4053, 7101), (5211, 5523)]