81072040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{289543}}^1$

素因数の和:289561

約数の個数: 32

約数和(自身を含む): 208471680

約数和(自身を除く): 127399640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 289543, 579086, 1158172, 1447715, 2026801, 2316344, 2895430, 4053602, 5790860, 8107204, 10134005, 11581720, 16214408, 20268010, 40536020, 81072040]

約数ペア:

[(1, 81072040), (2, 40536020), (4, 20268010), (5, 16214408), (7, 11581720), (8, 10134005), (10, 8107204), (14, 5790860), (20, 4053602), (28, 2895430), (35, 2316344), (40, 2026801), (56, 1447715), (70, 1158172), (140, 579086), (280, 289543)]