18991400

素因数分解:

$2^3\times 5^2\times {\mathrm{269}}^1\times {\mathrm{353}}^1$

素因数の和:638

約数の個数: 48

約数和(自身を含む): 44444700

約数和(自身を除く): 25453300

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 269, 353, 538, 706, 1076, 1345, 1412, 1765, 2152, 2690, 2824, 3530, 5380, 6725, 7060, 8825, 10760, 13450, 14120, 17650, 26900, 35300, 53800, 70600, 94957, 189914, 379828, 474785, 759656, 949570, 1899140, 2373925, 3798280, 4747850, 9495700, 18991400]

約数ペア:

[(1, 18991400), (2, 9495700), (4, 4747850), (5, 3798280), (8, 2373925), (10, 1899140), (20, 949570), (25, 759656), (40, 474785), (50, 379828), (100, 189914), (200, 94957), (269, 70600), (353, 53800), (538, 35300), (706, 26900), (1076, 17650), (1345, 14120), (1412, 13450), (1765, 10760), (2152, 8825), (2690, 7060), (2824, 6725), (3530, 5380)]