646194440

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{349}}^1\times {\mathrm{1129}}^1$

素因数の和:1530

約数の個数: 64

約数和(自身を含む): 1494990000

約数和(自身を除く): 848795560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 349, 410, 698, 820, 1129, 1396, 1640, 1745, 2258, 2792, 3490, 4516, 5645, 6980, 9032, 11290, 13960, 14309, 22580, 28618, 45160, 46289, 57236, 71545, 92578, 114472, 143090, 185156, 231445, 286180, 370312, 394021, 462890, 572360, 788042, 925780, 1576084, 1851560, 1970105, 3152168, 3940210, 7880420, 15760840, 16154861, 32309722, 64619444, 80774305, 129238888, 161548610, 323097220, 646194440]

約数ペア:

[(1, 646194440), (2, 323097220), (4, 161548610), (5, 129238888), (8, 80774305), (10, 64619444), (20, 32309722), (40, 16154861), (41, 15760840), (82, 7880420), (164, 3940210), (205, 3152168), (328, 1970105), (349, 1851560), (410, 1576084), (698, 925780), (820, 788042), (1129, 572360), (1396, 462890), (1640, 394021), (1745, 370312), (2258, 286180), (2792, 231445), (3490, 185156), (4516, 143090), (5645, 114472), (6980, 92578), (9032, 71545), (11290, 57236), (13960, 46289), (14309, 45160), (22580, 28618)]