280804900

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{68489}}^1$

素因数の和:68544

約数の個数: 36

約数和(自身を含む): 624217860

約数和(自身を除く): 343412960

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 820, 1025, 2050, 4100, 68489, 136978, 273956, 342445, 684890, 1369780, 1712225, 2808049, 3424450, 5616098, 6848900, 11232196, 14040245, 28080490, 56160980, 70201225, 140402450, 280804900]

約数ペア:

[(1, 280804900), (2, 140402450), (4, 70201225), (5, 56160980), (10, 28080490), (20, 14040245), (25, 11232196), (41, 6848900), (50, 5616098), (82, 3424450), (100, 2808049), (164, 1712225), (205, 1369780), (410, 684890), (820, 342445), (1025, 273956), (2050, 136978), (4100, 68489)]