21153405

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{15497}}^1$

素因数の和:15525

約数の個数: 32

約数和(自身を含む): 41658624

約数和(自身を除く): 20505219

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 15497, 46491, 77485, 108479, 201461, 232455, 325437, 542395, 604383, 1007305, 1410227, 1627185, 3021915, 4230681, 7051135, 21153405]

約数ペア:

[(1, 21153405), (3, 7051135), (5, 4230681), (7, 3021915), (13, 1627185), (15, 1410227), (21, 1007305), (35, 604383), (39, 542395), (65, 325437), (91, 232455), (105, 201461), (195, 108479), (273, 77485), (455, 46491), (1365, 15497)]