21138255

素因数分解:

$3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{8863}}^1$

素因数の和:8927

約数の個数: 24

約数和(自身を含む): 37335168

約数和(自身を除く): 16196913

約数列:

[1, 3, 5, 9, 15, 45, 53, 159, 265, 477, 795, 2385, 8863, 26589, 44315, 79767, 132945, 398835, 469739, 1409217, 2348695, 4227651, 7046085, 21138255]

約数ペア:

[(1, 21138255), (3, 7046085), (5, 4227651), (9, 2348695), (15, 1409217), (45, 469739), (53, 398835), (159, 132945), (265, 79767), (477, 44315), (795, 26589), (2385, 8863)]