80978075

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{199}}^1\times {\mathrm{397}}^1$

素因数の和:647

約数の個数: 24

約数和(自身を含む): 103639200

約数和(自身を除く): 22661125

約数列:

[1, 5, 25, 41, 199, 205, 397, 995, 1025, 1985, 4975, 8159, 9925, 16277, 40795, 79003, 81385, 203975, 395015, 406925, 1975075, 3239123, 16195615, 80978075]

約数ペア:

[(1, 80978075), (5, 16195615), (25, 3239123), (41, 1975075), (199, 406925), (205, 395015), (397, 203975), (995, 81385), (1025, 79003), (1985, 40795), (4975, 16277), (8159, 9925)]