12972220

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{1321}}^1$

素因数の和:1821

約数の個数: 24

約数和(自身を含む): 27317808

約数和(自身を除く): 14345588

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1321, 1964, 2455, 2642, 4910, 5284, 6605, 9820, 13210, 26420, 648611, 1297222, 2594444, 3243055, 6486110, 12972220]

約数ペア:

[(1, 12972220), (2, 6486110), (4, 3243055), (5, 2594444), (10, 1297222), (20, 648611), (491, 26420), (982, 13210), (1321, 9820), (1964, 6605), (2455, 5284), (2642, 4910)]