640248

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1$

素因数の和:156

約数の個数: 64

約数和(自身を含む): 1896960

約数和(自身を除く): 1256712

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 37, 42, 56, 74, 84, 103, 111, 148, 168, 206, 222, 259, 296, 309, 412, 444, 518, 618, 721, 777, 824, 888, 1036, 1236, 1442, 1554, 2072, 2163, 2472, 2884, 3108, 3811, 4326, 5768, 6216, 7622, 8652, 11433, 15244, 17304, 22866, 26677, 30488, 45732, 53354, 80031, 91464, 106708, 160062, 213416, 320124, 640248]

約数ペア:

[(1, 640248), (2, 320124), (3, 213416), (4, 160062), (6, 106708), (7, 91464), (8, 80031), (12, 53354), (14, 45732), (21, 30488), (24, 26677), (28, 22866), (37, 17304), (42, 15244), (56, 11433), (74, 8652), (84, 7622), (103, 6216), (111, 5768), (148, 4326), (168, 3811), (206, 3108), (222, 2884), (259, 2472), (296, 2163), (309, 2072), (412, 1554), (444, 1442), (518, 1236), (618, 1036), (721, 888), (777, 824)]