1281400

素因数分解:

$2^3\times 5^2\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:208

約数の個数: 48

約数和(自身を含む): 3069000

約数和(自身を除く): 1787600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 43, 50, 86, 100, 149, 172, 200, 215, 298, 344, 430, 596, 745, 860, 1075, 1192, 1490, 1720, 2150, 2980, 3725, 4300, 5960, 6407, 7450, 8600, 12814, 14900, 25628, 29800, 32035, 51256, 64070, 128140, 160175, 256280, 320350, 640700, 1281400]

約数ペア:

[(1, 1281400), (2, 640700), (4, 320350), (5, 256280), (8, 160175), (10, 128140), (20, 64070), (25, 51256), (40, 32035), (43, 29800), (50, 25628), (86, 14900), (100, 12814), (149, 8600), (172, 7450), (200, 6407), (215, 5960), (298, 4300), (344, 3725), (430, 2980), (596, 2150), (745, 1720), (860, 1490), (1075, 1192)]