64645540

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{821}}^1$

素因数の和:988

約数の個数: 48

約数和(自身を含む): 141410304

約数和(自身を除く): 76764764

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 127, 155, 254, 310, 508, 620, 635, 821, 1270, 1642, 2540, 3284, 3937, 4105, 7874, 8210, 15748, 16420, 19685, 25451, 39370, 50902, 78740, 101804, 104267, 127255, 208534, 254510, 417068, 509020, 521335, 1042670, 2085340, 3232277, 6464554, 12929108, 16161385, 32322770, 64645540]

約数ペア:

[(1, 64645540), (2, 32322770), (4, 16161385), (5, 12929108), (10, 6464554), (20, 3232277), (31, 2085340), (62, 1042670), (124, 521335), (127, 509020), (155, 417068), (254, 254510), (310, 208534), (508, 127255), (620, 104267), (635, 101804), (821, 78740), (1270, 50902), (1642, 39370), (2540, 25451), (3284, 19685), (3937, 16420), (4105, 15748), (7874, 8210)]