19972120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71329}}^1$

素因数の和:71347

約数の個数: 32

約数和(自身を含む): 51357600

約数和(自身を除く): 31385480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 71329, 142658, 285316, 356645, 499303, 570632, 713290, 998606, 1426580, 1997212, 2496515, 2853160, 3994424, 4993030, 9986060, 19972120]

約数ペア:

[(1, 19972120), (2, 9986060), (4, 4993030), (5, 3994424), (7, 2853160), (8, 2496515), (10, 1997212), (14, 1426580), (20, 998606), (28, 713290), (35, 570632), (40, 499303), (56, 356645), (70, 285316), (140, 142658), (280, 71329)]