21210520

素因数分解:

$2^3\times 5^1\times {\mathrm{577}}^1\times {\mathrm{919}}^1$

素因数の和:1507

約数の個数: 32

約数和(自身を含む): 47858400

約数和(自身を除く): 26647880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 577, 919, 1154, 1838, 2308, 2885, 3676, 4595, 4616, 5770, 7352, 9190, 11540, 18380, 23080, 36760, 530263, 1060526, 2121052, 2651315, 4242104, 5302630, 10605260, 21210520]

約数ペア:

[(1, 21210520), (2, 10605260), (4, 5302630), (5, 4242104), (8, 2651315), (10, 2121052), (20, 1060526), (40, 530263), (577, 36760), (919, 23080), (1154, 18380), (1838, 11540), (2308, 9190), (2885, 7352), (3676, 5770), (4595, 4616)]