19997510

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{773}}^1$

素因数の和:992

約数の個数: 32

約数和(自身を含む): 39009600

約数和(自身を除く): 19012090

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 199, 398, 773, 995, 1546, 1990, 2587, 3865, 5174, 7730, 10049, 12935, 20098, 25870, 50245, 100490, 153827, 307654, 769135, 1538270, 1999751, 3999502, 9998755, 19997510]

約数ペア:

[(1, 19997510), (2, 9998755), (5, 3999502), (10, 1999751), (13, 1538270), (26, 769135), (65, 307654), (130, 153827), (199, 100490), (398, 50245), (773, 25870), (995, 20098), (1546, 12935), (1990, 10049), (2587, 7730), (3865, 5174)]