20106880

素因数分解:

$2^7\times 5^1\times {\mathrm{89}}^1\times {\mathrm{353}}^1$

素因数の和:461

約数の個数: 64

約数和(自身を含む): 48745800

約数和(自身を除く): 28638920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 128, 160, 178, 320, 353, 356, 445, 640, 706, 712, 890, 1412, 1424, 1765, 1780, 2824, 2848, 3530, 3560, 5648, 5696, 7060, 7120, 11296, 11392, 14120, 14240, 22592, 28240, 28480, 31417, 45184, 56480, 56960, 62834, 112960, 125668, 157085, 225920, 251336, 314170, 502672, 628340, 1005344, 1256680, 2010688, 2513360, 4021376, 5026720, 10053440, 20106880]

約数ペア:

[(1, 20106880), (2, 10053440), (4, 5026720), (5, 4021376), (8, 2513360), (10, 2010688), (16, 1256680), (20, 1005344), (32, 628340), (40, 502672), (64, 314170), (80, 251336), (89, 225920), (128, 157085), (160, 125668), (178, 112960), (320, 62834), (353, 56960), (356, 56480), (445, 45184), (640, 31417), (706, 28480), (712, 28240), (890, 22592), (1412, 14240), (1424, 14120), (1765, 11392), (1780, 11296), (2824, 7120), (2848, 7060), (3530, 5696), (3560, 5648)]