21497980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{153557}}^1$

素因数の和:153573

約数の個数: 24

約数和(自身を含む): 51595488

約数和(自身を除く): 30097508

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 153557, 307114, 614228, 767785, 1074899, 1535570, 2149798, 3071140, 4299596, 5374495, 10748990, 21497980]

約数ペア:

[(1, 21497980), (2, 10748990), (4, 5374495), (5, 4299596), (7, 3071140), (10, 2149798), (14, 1535570), (20, 1074899), (28, 767785), (35, 614228), (70, 307114), (140, 153557)]