21195621

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{523}}^1$

素因数の和:630

約数の個数: 32

約数和(自身を含む): 33536000

約数和(自身を除く): 12340379

約数列:

[1, 3, 9, 19, 27, 57, 79, 171, 237, 513, 523, 711, 1501, 1569, 2133, 4503, 4707, 9937, 13509, 14121, 29811, 40527, 41317, 89433, 123951, 268299, 371853, 785023, 1115559, 2355069, 7065207, 21195621]

約数ペア:

[(1, 21195621), (3, 7065207), (9, 2355069), (19, 1115559), (27, 785023), (57, 371853), (79, 268299), (171, 123951), (237, 89433), (513, 41317), (523, 40527), (711, 29811), (1501, 14121), (1569, 13509), (2133, 9937), (4503, 4707)]