21201680

素因数分解:

$2^4\times 5^1\times {\mathrm{265021}}^1$

素因数の和:265034

約数の個数: 20

約数和(自身を含む): 49294092

約数和(自身を除く): 28092412

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265021, 530042, 1060084, 1325105, 2120168, 2650210, 4240336, 5300420, 10600840, 21201680]

約数ペア:

[(1, 21201680), (2, 10600840), (4, 5300420), (5, 4240336), (8, 2650210), (10, 2120168), (16, 1325105), (20, 1060084), (40, 530042), (80, 265021)]