21061287

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{227}}^1$

素因数の和:320

約数の個数: 36

約数和(自身を含む): 33629544

約数和(自身を除く): 12568257

約数列:

[1, 3, 9, 13, 39, 61, 117, 169, 183, 227, 507, 549, 681, 793, 1521, 2043, 2379, 2951, 7137, 8853, 10309, 13847, 26559, 30927, 38363, 41541, 92781, 115089, 124623, 180011, 345267, 540033, 1620099, 2340143, 7020429, 21061287]

約数ペア:

[(1, 21061287), (3, 7020429), (9, 2340143), (13, 1620099), (39, 540033), (61, 345267), (117, 180011), (169, 124623), (183, 115089), (227, 92781), (507, 41541), (549, 38363), (681, 30927), (793, 26559), (1521, 13847), (2043, 10309), (2379, 8853), (2951, 7137)]