21231680

素因数分解:

$2^6\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1543}}^1$

素因数の和:1603

約数の個数: 56

約数和(自身を含む): 51767232

約数和(自身を除く): 30535552

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 160, 172, 215, 320, 344, 430, 688, 860, 1376, 1543, 1720, 2752, 3086, 3440, 6172, 6880, 7715, 12344, 13760, 15430, 24688, 30860, 49376, 61720, 66349, 98752, 123440, 132698, 246880, 265396, 331745, 493760, 530792, 663490, 1061584, 1326980, 2123168, 2653960, 4246336, 5307920, 10615840, 21231680]

約数ペア:

[(1, 21231680), (2, 10615840), (4, 5307920), (5, 4246336), (8, 2653960), (10, 2123168), (16, 1326980), (20, 1061584), (32, 663490), (40, 530792), (43, 493760), (64, 331745), (80, 265396), (86, 246880), (160, 132698), (172, 123440), (215, 98752), (320, 66349), (344, 61720), (430, 49376), (688, 30860), (860, 24688), (1376, 15430), (1543, 13760), (1720, 12344), (2752, 7715), (3086, 6880), (3440, 6172)]