20101280

素因数分解:

$2^5\times 5^1\times {\mathrm{73}}^1\times {\mathrm{1721}}^1$

素因数の和:1809

約数の個数: 48

約数和(自身を含む): 48167784

約数和(自身を除く): 28066504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 73, 80, 146, 160, 292, 365, 584, 730, 1168, 1460, 1721, 2336, 2920, 3442, 5840, 6884, 8605, 11680, 13768, 17210, 27536, 34420, 55072, 68840, 125633, 137680, 251266, 275360, 502532, 628165, 1005064, 1256330, 2010128, 2512660, 4020256, 5025320, 10050640, 20101280]

約数ペア:

[(1, 20101280), (2, 10050640), (4, 5025320), (5, 4020256), (8, 2512660), (10, 2010128), (16, 1256330), (20, 1005064), (32, 628165), (40, 502532), (73, 275360), (80, 251266), (146, 137680), (160, 125633), (292, 68840), (365, 55072), (584, 34420), (730, 27536), (1168, 17210), (1460, 13768), (1721, 11680), (2336, 8605), (2920, 6884), (3442, 5840)]