256486377

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{79}}^2\times {\mathrm{103}}^1$

素因数の和:290

約数の個数: 48

約数和(自身を含む): 420725760

約数和(自身を除く): 164239383

約数列:

[1, 3, 7, 19, 21, 57, 79, 103, 133, 237, 309, 399, 553, 721, 1501, 1659, 1957, 2163, 4503, 5871, 6241, 8137, 10507, 13699, 18723, 24411, 31521, 41097, 43687, 56959, 118579, 131061, 154603, 170877, 355737, 463809, 642823, 830053, 1082221, 1928469, 2490159, 3246663, 4499761, 12213637, 13499283, 36640911, 85495459, 256486377]

約数ペア:

[(1, 256486377), (3, 85495459), (7, 36640911), (19, 13499283), (21, 12213637), (57, 4499761), (79, 3246663), (103, 2490159), (133, 1928469), (237, 1082221), (309, 830053), (399, 642823), (553, 463809), (721, 355737), (1501, 170877), (1659, 154603), (1957, 131061), (2163, 118579), (4503, 56959), (5871, 43687), (6241, 41097), (8137, 31521), (10507, 24411), (13699, 18723)]