20747745

素因数分解:

$3^4\times 5^1\times {\mathrm{51229}}^1$

素因数の和:51246

約数の個数: 20

約数和(自身を含む): 37192980

約数和(自身を除く): 16445235

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51229, 153687, 256145, 461061, 768435, 1383183, 2305305, 4149549, 6915915, 20747745]

約数ペア:

[(1, 20747745), (3, 6915915), (5, 4149549), (9, 2305305), (15, 1383183), (27, 768435), (45, 461061), (81, 256145), (135, 153687), (405, 51229)]