81457040

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{145459}}^1$

素因数の和:145479

約数の個数: 40

約数和(自身を含む): 216444480

約数和(自身を除く): 134987440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 145459, 290918, 581836, 727295, 1018213, 1163672, 1454590, 2036426, 2327344, 2909180, 4072852, 5091065, 5818360, 8145704, 10182130, 11636720, 16291408, 20364260, 40728520, 81457040]

約数ペア:

[(1, 81457040), (2, 40728520), (4, 20364260), (5, 16291408), (7, 11636720), (8, 10182130), (10, 8145704), (14, 5818360), (16, 5091065), (20, 4072852), (28, 2909180), (35, 2327344), (40, 2036426), (56, 1454590), (70, 1163672), (80, 1018213), (112, 727295), (140, 581836), (280, 290918), (560, 145459)]