20980040

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{30853}}^1$

素因数の和:30881

約数の個数: 32

約数和(自身を含む): 49983480

約数和(自身を除く): 29003440

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 30853, 61706, 123412, 154265, 246824, 308530, 524501, 617060, 1049002, 1234120, 2098004, 2622505, 4196008, 5245010, 10490020, 20980040]

約数ペア:

[(1, 20980040), (2, 10490020), (4, 5245010), (5, 4196008), (8, 2622505), (10, 2098004), (17, 1234120), (20, 1049002), (34, 617060), (40, 524501), (68, 308530), (85, 246824), (136, 154265), (170, 123412), (340, 61706), (680, 30853)]