2205040

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{641}}^1$

素因数の和:697

約数の個数: 40

約数和(自身を含む): 5254128

約数和(自身を除く): 3049088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 641, 688, 860, 1282, 1720, 2564, 3205, 3440, 5128, 6410, 10256, 12820, 25640, 27563, 51280, 55126, 110252, 137815, 220504, 275630, 441008, 551260, 1102520, 2205040]

約数ペア:

[(1, 2205040), (2, 1102520), (4, 551260), (5, 441008), (8, 275630), (10, 220504), (16, 137815), (20, 110252), (40, 55126), (43, 51280), (80, 27563), (86, 25640), (172, 12820), (215, 10256), (344, 6410), (430, 5128), (641, 3440), (688, 3205), (860, 2564), (1282, 1720)]