20501960

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7219}}^1$

素因数の和:7301

約数の個数: 32

約数和(自身を含む): 46785600

約数和(自身を除く): 26283640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7219, 14438, 28876, 36095, 57752, 72190, 144380, 288760, 512549, 1025098, 2050196, 2562745, 4100392, 5125490, 10250980, 20501960]

約数ペア:

[(1, 20501960), (2, 10250980), (4, 5125490), (5, 4100392), (8, 2562745), (10, 2050196), (20, 1025098), (40, 512549), (71, 288760), (142, 144380), (284, 72190), (355, 57752), (568, 36095), (710, 28876), (1420, 14438), (2840, 7219)]