21740418

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{157}}^2$

素因数の和:336

約数の個数: 54

約数和(自身を含む): 55145961

約数和(自身を除く): 33405543

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 63, 98, 126, 147, 157, 294, 314, 441, 471, 882, 942, 1099, 1413, 2198, 2826, 3297, 6594, 7693, 9891, 15386, 19782, 23079, 24649, 46158, 49298, 69237, 73947, 138474, 147894, 172543, 221841, 345086, 443682, 517629, 1035258, 1207801, 1552887, 2415602, 3105774, 3623403, 7246806, 10870209, 21740418]

約数ペア:

[(1, 21740418), (2, 10870209), (3, 7246806), (6, 3623403), (7, 3105774), (9, 2415602), (14, 1552887), (18, 1207801), (21, 1035258), (42, 517629), (49, 443682), (63, 345086), (98, 221841), (126, 172543), (147, 147894), (157, 138474), (294, 73947), (314, 69237), (441, 49298), (471, 46158), (882, 24649), (942, 23079), (1099, 19782), (1413, 15386), (2198, 9891), (2826, 7693), (3297, 6594)]