20001016

素因数分解:

$2^3\times 7^3\times {\mathrm{37}}^1\times {\mathrm{197}}^1$

素因数の和:261

約数の個数: 64

約数和(自身を含む): 45144000

約数和(自身を除く): 25142984

約数列:

[1, 2, 4, 7, 8, 14, 28, 37, 49, 56, 74, 98, 148, 196, 197, 259, 296, 343, 392, 394, 518, 686, 788, 1036, 1372, 1379, 1576, 1813, 2072, 2744, 2758, 3626, 5516, 7252, 7289, 9653, 11032, 12691, 14504, 14578, 19306, 25382, 29156, 38612, 50764, 51023, 58312, 67571, 77224, 101528, 102046, 135142, 204092, 270284, 357161, 408184, 540568, 714322, 1428644, 2500127, 2857288, 5000254, 10000508, 20001016]

約数ペア:

[(1, 20001016), (2, 10000508), (4, 5000254), (7, 2857288), (8, 2500127), (14, 1428644), (28, 714322), (37, 540568), (49, 408184), (56, 357161), (74, 270284), (98, 204092), (148, 135142), (196, 102046), (197, 101528), (259, 77224), (296, 67571), (343, 58312), (392, 51023), (394, 50764), (518, 38612), (686, 29156), (788, 25382), (1036, 19306), (1372, 14578), (1379, 14504), (1576, 12691), (1813, 11032), (2072, 9653), (2744, 7289), (2758, 7252), (3626, 5516)]