81268040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{290243}}^1$

素因数の和:290261

約数の個数: 32

約数和(自身を含む): 208975680

約数和(自身を除く): 127707640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 290243, 580486, 1160972, 1451215, 2031701, 2321944, 2902430, 4063402, 5804860, 8126804, 10158505, 11609720, 16253608, 20317010, 40634020, 81268040]

約数ペア:

[(1, 81268040), (2, 40634020), (4, 20317010), (5, 16253608), (7, 11609720), (8, 10158505), (10, 8126804), (14, 5804860), (20, 4063402), (28, 2902430), (35, 2321944), (40, 2031701), (56, 1451215), (70, 1160972), (140, 580486), (280, 290243)]