21240063

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{877}}^1$

素因数の和:925

約数の個数: 40

約数和(自身を含む): 35695968

約数和(自身を除く): 14455905

約数列:

[1, 3, 9, 13, 23, 27, 39, 69, 81, 117, 207, 299, 351, 621, 877, 897, 1053, 1863, 2631, 2691, 7893, 8073, 11401, 20171, 23679, 24219, 34203, 60513, 71037, 102609, 181539, 262223, 307827, 544617, 786669, 923481, 1633851, 2360007, 7080021, 21240063]

約数ペア:

[(1, 21240063), (3, 7080021), (9, 2360007), (13, 1633851), (23, 923481), (27, 786669), (39, 544617), (69, 307827), (81, 262223), (117, 181539), (207, 102609), (299, 71037), (351, 60513), (621, 34203), (877, 24219), (897, 23679), (1053, 20171), (1863, 11401), (2631, 8073), (2691, 7893)]