21512757

素因数分解:

$3^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{97}}^1\times {\mathrm{179}}^1$

素因数の和:345

約数の個数: 32

約数和(自身を含む): 33868800

約数和(自身を除く): 12356043

約数列:

[1, 3, 7, 21, 59, 97, 177, 179, 291, 413, 537, 679, 1239, 1253, 2037, 3759, 5723, 10561, 17169, 17363, 31683, 40061, 52089, 73927, 120183, 121541, 221781, 364623, 1024417, 3073251, 7170919, 21512757]

約数ペア:

[(1, 21512757), (3, 7170919), (7, 3073251), (21, 1024417), (59, 364623), (97, 221781), (177, 121541), (179, 120183), (291, 73927), (413, 52089), (537, 40061), (679, 31683), (1239, 17363), (1253, 17169), (2037, 10561), (3759, 5723)]