81404320

素因数分解:

$2^5\times 5^1\times {\mathrm{251}}^1\times {\mathrm{2027}}^1$

素因数の和:2293

約数の個数: 48

約数和(自身を含む): 193179168

約数和(自身を除く): 111774848

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 251, 502, 1004, 1255, 2008, 2027, 2510, 4016, 4054, 5020, 8032, 8108, 10040, 10135, 16216, 20080, 20270, 32432, 40160, 40540, 64864, 81080, 162160, 324320, 508777, 1017554, 2035108, 2543885, 4070216, 5087770, 8140432, 10175540, 16280864, 20351080, 40702160, 81404320]

約数ペア:

[(1, 81404320), (2, 40702160), (4, 20351080), (5, 16280864), (8, 10175540), (10, 8140432), (16, 5087770), (20, 4070216), (32, 2543885), (40, 2035108), (80, 1017554), (160, 508777), (251, 324320), (502, 162160), (1004, 81080), (1255, 64864), (2008, 40540), (2027, 40160), (2510, 32432), (4016, 20270), (4054, 20080), (5020, 16216), (8032, 10135), (8108, 10040)]