28271780

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{2879}}^1$

素因数の和:3379

約数の個数: 24

約数和(自身を含む): 59512320

約数和(自身を除く): 31240540

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1964, 2455, 2879, 4910, 5758, 9820, 11516, 14395, 28790, 57580, 1413589, 2827178, 5654356, 7067945, 14135890, 28271780]

約数ペア:

[(1, 28271780), (2, 14135890), (4, 7067945), (5, 5654356), (10, 2827178), (20, 1413589), (491, 57580), (982, 28790), (1964, 14395), (2455, 11516), (2879, 9820), (4910, 5758)]