20728425

素因数分解:

$3^1\times 5^2\times {\mathrm{313}}^1\times {\mathrm{883}}^1$

素因数の和:1209

約数の個数: 24

約数和(自身を含む): 34419424

約数和(自身を除く): 13690999

約数列:

[1, 3, 5, 15, 25, 75, 313, 883, 939, 1565, 2649, 4415, 4695, 7825, 13245, 22075, 23475, 66225, 276379, 829137, 1381895, 4145685, 6909475, 20728425]

約数ペア:

[(1, 20728425), (3, 6909475), (5, 4145685), (15, 1381895), (25, 829137), (75, 276379), (313, 66225), (883, 23475), (939, 22075), (1565, 13245), (2649, 7825), (4415, 4695)]