21293739

素因数分解:

$3^3\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:304

約数の個数: 32

約数和(自身を含む): 32640000

約数和(自身を除く): 11346261

約数列:

[1, 3, 9, 27, 67, 79, 149, 201, 237, 447, 603, 711, 1341, 1809, 2133, 4023, 5293, 9983, 11771, 15879, 29949, 35313, 47637, 89847, 105939, 142911, 269541, 317817, 788657, 2365971, 7097913, 21293739]

約数ペア:

[(1, 21293739), (3, 7097913), (9, 2365971), (27, 788657), (67, 317817), (79, 269541), (149, 142911), (201, 105939), (237, 89847), (447, 47637), (603, 35313), (711, 29949), (1341, 15879), (1809, 11771), (2133, 9983), (4023, 5293)]