978889720

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{109741}}^1$

素因数の和:109975

約数の個数: 32

約数和(自身を含む): 2212398720

約数和(自身を除く): 1233509000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2230, 4460, 8920, 109741, 219482, 438964, 548705, 877928, 1097410, 2194820, 4389640, 24472243, 48944486, 97888972, 122361215, 195777944, 244722430, 489444860, 978889720]

約数ペア:

[(1, 978889720), (2, 489444860), (4, 244722430), (5, 195777944), (8, 122361215), (10, 97888972), (20, 48944486), (40, 24472243), (223, 4389640), (446, 2194820), (892, 1097410), (1115, 877928), (1784, 548705), (2230, 438964), (4460, 219482), (8920, 109741)]