81700892

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{577}}^1$

素因数の和:990

約数の個数: 48

約数和(自身を含む): 176729280

約数和(自身を除く): 95028388

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 182, 364, 389, 577, 778, 1154, 1556, 2308, 2723, 4039, 5057, 5446, 7501, 8078, 10114, 10892, 15002, 16156, 20228, 30004, 35399, 52507, 70798, 105014, 141596, 210028, 224453, 448906, 897812, 1571171, 2917889, 3142342, 5835778, 6284684, 11671556, 20425223, 40850446, 81700892]

約数ペア:

[(1, 81700892), (2, 40850446), (4, 20425223), (7, 11671556), (13, 6284684), (14, 5835778), (26, 3142342), (28, 2917889), (52, 1571171), (91, 897812), (182, 448906), (364, 224453), (389, 210028), (577, 141596), (778, 105014), (1154, 70798), (1556, 52507), (2308, 35399), (2723, 30004), (4039, 20228), (5057, 16156), (5446, 15002), (7501, 10892), (8078, 10114)]