20928735

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{277}}^1$

素因数の和:384

約数の個数: 48

約数和(自身を含む): 38510784

約数和(自身を除く): 17582049

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 73, 115, 207, 219, 277, 345, 365, 657, 831, 1035, 1095, 1385, 1679, 2493, 3285, 4155, 5037, 6371, 8395, 12465, 15111, 19113, 20221, 25185, 31855, 57339, 60663, 75555, 95565, 101105, 181989, 286695, 303315, 465083, 909945, 1395249, 2325415, 4185747, 6976245, 20928735]

約数ペア:

[(1, 20928735), (3, 6976245), (5, 4185747), (9, 2325415), (15, 1395249), (23, 909945), (45, 465083), (69, 303315), (73, 286695), (115, 181989), (207, 101105), (219, 95565), (277, 75555), (345, 60663), (365, 57339), (657, 31855), (831, 25185), (1035, 20221), (1095, 19113), (1385, 15111), (1679, 12465), (2493, 8395), (3285, 6371), (4155, 5037)]