20755760

素因数分解:

$2^4\times 5^1\times {\mathrm{401}}^1\times {\mathrm{647}}^1$

素因数の和:1061

約数の個数: 40

約数和(自身を含む): 48452256

約数和(自身を除く): 27696496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 401, 647, 802, 1294, 1604, 2005, 2588, 3208, 3235, 4010, 5176, 6416, 6470, 8020, 10352, 12940, 16040, 25880, 32080, 51760, 259447, 518894, 1037788, 1297235, 2075576, 2594470, 4151152, 5188940, 10377880, 20755760]

約数ペア:

[(1, 20755760), (2, 10377880), (4, 5188940), (5, 4151152), (8, 2594470), (10, 2075576), (16, 1297235), (20, 1037788), (40, 518894), (80, 259447), (401, 51760), (647, 32080), (802, 25880), (1294, 16040), (1604, 12940), (2005, 10352), (2588, 8020), (3208, 6470), (3235, 6416), (4010, 5176)]