21402765

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:211

約数の個数: 64

約数和(自身を含む): 40711680

約数和(自身を除く): 19308915

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 61, 69, 113, 115, 135, 183, 207, 305, 339, 345, 549, 565, 621, 915, 1017, 1035, 1403, 1647, 1695, 2599, 2745, 3051, 3105, 4209, 5085, 6893, 7015, 7797, 8235, 12627, 12995, 15255, 20679, 21045, 23391, 34465, 37881, 38985, 62037, 63135, 70173, 103395, 116955, 158539, 186111, 189405, 310185, 350865, 475617, 792695, 930555, 1426851, 2378085, 4280553, 7134255, 21402765]

約数ペア:

[(1, 21402765), (3, 7134255), (5, 4280553), (9, 2378085), (15, 1426851), (23, 930555), (27, 792695), (45, 475617), (61, 350865), (69, 310185), (113, 189405), (115, 186111), (135, 158539), (183, 116955), (207, 103395), (305, 70173), (339, 63135), (345, 62037), (549, 38985), (565, 37881), (621, 34465), (915, 23391), (1017, 21045), (1035, 20679), (1403, 15255), (1647, 12995), (1695, 12627), (2599, 8235), (2745, 7797), (3051, 7015), (3105, 6893), (4209, 5085)]