81213808

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{53}}^2\times {\mathrm{139}}^1$

素因数の和:266

約数の個数: 60

約数和(自身を含む): 173955880

約数和(自身を除く): 92742072

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 53, 104, 106, 139, 208, 212, 278, 424, 556, 689, 848, 1112, 1378, 1807, 2224, 2756, 2809, 3614, 5512, 5618, 7228, 7367, 11024, 11236, 14456, 14734, 22472, 28912, 29468, 36517, 44944, 58936, 73034, 95771, 117872, 146068, 191542, 292136, 383084, 390451, 584272, 766168, 780902, 1532336, 1561804, 3123608, 5075863, 6247216, 10151726, 20303452, 40606904, 81213808]

約数ペア:

[(1, 81213808), (2, 40606904), (4, 20303452), (8, 10151726), (13, 6247216), (16, 5075863), (26, 3123608), (52, 1561804), (53, 1532336), (104, 780902), (106, 766168), (139, 584272), (208, 390451), (212, 383084), (278, 292136), (424, 191542), (556, 146068), (689, 117872), (848, 95771), (1112, 73034), (1378, 58936), (1807, 44944), (2224, 36517), (2756, 29468), (2809, 28912), (3614, 22472), (5512, 14734), (5618, 14456), (7228, 11236), (7367, 11024)]