261621374

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{257}}^1$

素因数の和:417

約数の個数: 64

約数和(自身を含む): 490406400

約数和(自身を除く): 228785026

約数列:

[1, 2, 7, 14, 19, 38, 43, 86, 89, 133, 178, 257, 266, 301, 514, 602, 623, 817, 1246, 1634, 1691, 1799, 3382, 3598, 3827, 4883, 5719, 7654, 9766, 11051, 11438, 11837, 22102, 22873, 23674, 26789, 34181, 45746, 53578, 68362, 72713, 77357, 145426, 154714, 160111, 209969, 320222, 419938, 434587, 508991, 869174, 983539, 1017982, 1469783, 1967078, 2939566, 3042109, 6084218, 6884773, 13769546, 18687241, 37374482, 130810687, 261621374]

約数ペア:

[(1, 261621374), (2, 130810687), (7, 37374482), (14, 18687241), (19, 13769546), (38, 6884773), (43, 6084218), (86, 3042109), (89, 2939566), (133, 1967078), (178, 1469783), (257, 1017982), (266, 983539), (301, 869174), (514, 508991), (602, 434587), (623, 419938), (817, 320222), (1246, 209969), (1634, 160111), (1691, 154714), (1799, 145426), (3382, 77357), (3598, 72713), (3827, 68362), (4883, 53578), (5719, 45746), (7654, 34181), (9766, 26789), (11051, 23674), (11438, 22873), (11837, 22102)]