18388735

素因数分解:

$5^1\times {\mathrm{31}}^2\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:199

約数の個数: 24

約数和(自身を含む): 23593680

約数和(自身を除く): 5204945

約数列:

[1, 5, 31, 43, 89, 155, 215, 445, 961, 1333, 2759, 3827, 4805, 6665, 13795, 19135, 41323, 85529, 118637, 206615, 427645, 593185, 3677747, 18388735]

約数ペア:

[(1, 18388735), (5, 3677747), (31, 593185), (43, 427645), (89, 206615), (155, 118637), (215, 85529), (445, 41323), (961, 19135), (1333, 13795), (2759, 6665), (3827, 4805)]