18853640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{2789}}^1$

素因数の和:2826

約数の個数: 48

約数和(自身を含む): 45951300

約数和(自身を除く): 27097660

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 169, 260, 338, 520, 676, 845, 1352, 1690, 2789, 3380, 5578, 6760, 11156, 13945, 22312, 27890, 36257, 55780, 72514, 111560, 145028, 181285, 290056, 362570, 471341, 725140, 942682, 1450280, 1885364, 2356705, 3770728, 4713410, 9426820, 18853640]

約数ペア:

[(1, 18853640), (2, 9426820), (4, 4713410), (5, 3770728), (8, 2356705), (10, 1885364), (13, 1450280), (20, 942682), (26, 725140), (40, 471341), (52, 362570), (65, 290056), (104, 181285), (130, 145028), (169, 111560), (260, 72514), (338, 55780), (520, 36257), (676, 27890), (845, 22312), (1352, 13945), (1690, 11156), (2789, 6760), (3380, 5578)]