20179876880

素因数分解:

$2^4\times 5^1\times {\mathrm{1931}}^1\times {\mathrm{130631}}^1$

素因数の和:132575

約数の個数: 40

約数和(自身を含む): 46942870464

約数和(自身を除く): 26762993584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1931, 3862, 7724, 9655, 15448, 19310, 30896, 38620, 77240, 130631, 154480, 261262, 522524, 653155, 1045048, 1306310, 2090096, 2612620, 5225240, 10450480, 252248461, 504496922, 1008993844, 1261242305, 2017987688, 2522484610, 4035975376, 5044969220, 10089938440, 20179876880]

約数ペア:

[(1, 20179876880), (2, 10089938440), (4, 5044969220), (5, 4035975376), (8, 2522484610), (10, 2017987688), (16, 1261242305), (20, 1008993844), (40, 504496922), (80, 252248461), (1931, 10450480), (3862, 5225240), (7724, 2612620), (9655, 2090096), (15448, 1306310), (19310, 1045048), (30896, 653155), (38620, 522524), (77240, 261262), (130631, 154480)]