81515810

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:251

約数の個数: 64

約数和(自身を含む): 159563520

約数和(自身を除く): 78047710

約数列:

[1, 2, 5, 10, 29, 37, 58, 71, 74, 107, 142, 145, 185, 214, 290, 355, 370, 535, 710, 1070, 1073, 2059, 2146, 2627, 3103, 3959, 4118, 5254, 5365, 6206, 7597, 7918, 10295, 10730, 13135, 15194, 15515, 19795, 20590, 26270, 31030, 37985, 39590, 75970, 76183, 114811, 152366, 220313, 229622, 281089, 380915, 440626, 562178, 574055, 761830, 1101565, 1148110, 1405445, 2203130, 2810890, 8151581, 16303162, 40757905, 81515810]

約数ペア:

[(1, 81515810), (2, 40757905), (5, 16303162), (10, 8151581), (29, 2810890), (37, 2203130), (58, 1405445), (71, 1148110), (74, 1101565), (107, 761830), (142, 574055), (145, 562178), (185, 440626), (214, 380915), (290, 281089), (355, 229622), (370, 220313), (535, 152366), (710, 114811), (1070, 76183), (1073, 75970), (2059, 39590), (2146, 37985), (2627, 31030), (3103, 26270), (3959, 20590), (4118, 19795), (5254, 15515), (5365, 15194), (6206, 13135), (7597, 10730), (7918, 10295)]