20091320

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11681}}^1$

素因数の和:11735

約数の個数: 32

約数和(自身を含む): 46260720

約数和(自身を除く): 26169400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11681, 23362, 46724, 58405, 93448, 116810, 233620, 467240, 502283, 1004566, 2009132, 2511415, 4018264, 5022830, 10045660, 20091320]

約数ペア:

[(1, 20091320), (2, 10045660), (4, 5022830), (5, 4018264), (8, 2511415), (10, 2009132), (20, 1004566), (40, 502283), (43, 467240), (86, 233620), (172, 116810), (215, 93448), (344, 58405), (430, 46724), (860, 23362), (1720, 11681)]