16401920

素因数分解:

$2^9\times 5^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:215

約数の個数: 80

約数和(自身を含む): 40510800

約数和(自身を除く): 24108880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 128, 149, 160, 172, 215, 256, 298, 320, 344, 430, 512, 596, 640, 688, 745, 860, 1192, 1280, 1376, 1490, 1720, 2384, 2560, 2752, 2980, 3440, 4768, 5504, 5960, 6407, 6880, 9536, 11008, 11920, 12814, 13760, 19072, 22016, 23840, 25628, 27520, 32035, 38144, 47680, 51256, 55040, 64070, 76288, 95360, 102512, 110080, 128140, 190720, 205024, 256280, 381440, 410048, 512560, 820096, 1025120, 1640192, 2050240, 3280384, 4100480, 8200960, 16401920]

約数ペア:

[(1, 16401920), (2, 8200960), (4, 4100480), (5, 3280384), (8, 2050240), (10, 1640192), (16, 1025120), (20, 820096), (32, 512560), (40, 410048), (43, 381440), (64, 256280), (80, 205024), (86, 190720), (128, 128140), (149, 110080), (160, 102512), (172, 95360), (215, 76288), (256, 64070), (298, 55040), (320, 51256), (344, 47680), (430, 38144), (512, 32035), (596, 27520), (640, 25628), (688, 23840), (745, 22016), (860, 19072), (1192, 13760), (1280, 12814), (1376, 11920), (1490, 11008), (1720, 9536), (2384, 6880), (2560, 6407), (2752, 5960), (2980, 5504), (3440, 4768)]