81407800

素因数分解:

$2^3\times 5^2\times {\mathrm{491}}^1\times {\mathrm{829}}^1$

素因数の和:1336

約数の個数: 48

約数和(自身を含む): 189887400

約数和(自身を除く): 108479600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 491, 829, 982, 1658, 1964, 2455, 3316, 3928, 4145, 4910, 6632, 8290, 9820, 12275, 16580, 19640, 20725, 24550, 33160, 41450, 49100, 82900, 98200, 165800, 407039, 814078, 1628156, 2035195, 3256312, 4070390, 8140780, 10175975, 16281560, 20351950, 40703900, 81407800]

約数ペア:

[(1, 81407800), (2, 40703900), (4, 20351950), (5, 16281560), (8, 10175975), (10, 8140780), (20, 4070390), (25, 3256312), (40, 2035195), (50, 1628156), (100, 814078), (200, 407039), (491, 165800), (829, 98200), (982, 82900), (1658, 49100), (1964, 41450), (2455, 33160), (3316, 24550), (3928, 20725), (4145, 19640), (4910, 16580), (6632, 12275), (8290, 9820)]