20420855

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1213}}^1$

素因数の和:1275

約数の個数: 32

約数和(自身を含む): 31000704

約数和(自身を除く): 10579849

約数列:

[1, 5, 7, 13, 35, 37, 65, 91, 185, 259, 455, 481, 1213, 1295, 2405, 3367, 6065, 8491, 15769, 16835, 42455, 44881, 78845, 110383, 224405, 314167, 551915, 583453, 1570835, 2917265, 4084171, 20420855]

約数ペア:

[(1, 20420855), (5, 4084171), (7, 2917265), (13, 1570835), (35, 583453), (37, 551915), (65, 314167), (91, 224405), (185, 110383), (259, 78845), (455, 44881), (481, 42455), (1213, 16835), (1295, 15769), (2405, 8491), (3367, 6065)]