21355980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{355933}}^1$

素因数の和:355945

約数の個数: 24

約数和(自身を含む): 59796912

約数和(自身を除く): 38440932

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 355933, 711866, 1067799, 1423732, 1779665, 2135598, 3559330, 4271196, 5338995, 7118660, 10677990, 21355980]

約数ペア:

[(1, 21355980), (2, 10677990), (3, 7118660), (4, 5338995), (5, 4271196), (6, 3559330), (10, 2135598), (12, 1779665), (15, 1423732), (20, 1067799), (30, 711866), (60, 355933)]