720197781

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1\times {\mathrm{1231}}^1$

素因数の和:1457

約数の個数: 32

約数和(自身を含む): 1026600960

約数和(自身を除く): 306403179

約数列:

[1, 3, 23, 61, 69, 139, 183, 417, 1231, 1403, 3197, 3693, 4209, 8479, 9591, 25437, 28313, 75091, 84939, 171109, 195017, 225273, 513327, 585051, 1727093, 3935507, 5181279, 10437649, 11806521, 31312947, 240065927, 720197781]

約数ペア:

[(1, 720197781), (3, 240065927), (23, 31312947), (61, 11806521), (69, 10437649), (139, 5181279), (183, 3935507), (417, 1727093), (1231, 585051), (1403, 513327), (3197, 225273), (3693, 195017), (4209, 171109), (8479, 84939), (9591, 75091), (25437, 28313)]