21200955

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{1171}}^1$

素因数の和:1267

約数の個数: 32

約数和(自身を含む): 36453888

約数和(自身を除く): 15252933

約数列:

[1, 3, 5, 15, 17, 51, 71, 85, 213, 255, 355, 1065, 1171, 1207, 3513, 3621, 5855, 6035, 17565, 18105, 19907, 59721, 83141, 99535, 249423, 298605, 415705, 1247115, 1413397, 4240191, 7066985, 21200955]

約数ペア:

[(1, 21200955), (3, 7066985), (5, 4240191), (15, 1413397), (17, 1247115), (51, 415705), (71, 298605), (85, 249423), (213, 99535), (255, 83141), (355, 59721), (1065, 19907), (1171, 18105), (1207, 17565), (3513, 6035), (3621, 5855)]