20478075

素因数分解:

$3^1\times 5^2\times {\mathrm{137}}^1\times {\mathrm{1993}}^1$

素因数の和:2143

約数の個数: 24

約数和(自身を含む): 34121328

約数和(自身を除く): 13643253

約数列:

[1, 3, 5, 15, 25, 75, 137, 411, 685, 1993, 2055, 3425, 5979, 9965, 10275, 29895, 49825, 149475, 273041, 819123, 1365205, 4095615, 6826025, 20478075]

約数ペア:

[(1, 20478075), (3, 6826025), (5, 4095615), (15, 1365205), (25, 819123), (75, 273041), (137, 149475), (411, 49825), (685, 29895), (1993, 10275), (2055, 9965), (3425, 5979)]