19978840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71353}}^1$

素因数の和:71371

約数の個数: 32

約数和(自身を含む): 51374880

約数和(自身を除く): 31396040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 71353, 142706, 285412, 356765, 499471, 570824, 713530, 998942, 1427060, 1997884, 2497355, 2854120, 3995768, 4994710, 9989420, 19978840]

約数ペア:

[(1, 19978840), (2, 9989420), (4, 4994710), (5, 3995768), (7, 2854120), (8, 2497355), (10, 1997884), (14, 1427060), (20, 998942), (28, 713530), (35, 570824), (40, 499471), (56, 356765), (70, 285412), (140, 142706), (280, 71353)]