20984680

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4813}}^1$

素因数の和:4933

約数の個数: 32

約数和(自身を含む): 47658600

約数和(自身を除く): 26673920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4813, 9626, 19252, 24065, 38504, 48130, 96260, 192520, 524617, 1049234, 2098468, 2623085, 4196936, 5246170, 10492340, 20984680]

約数ペア:

[(1, 20984680), (2, 10492340), (4, 5246170), (5, 4196936), (8, 2623085), (10, 2098468), (20, 1049234), (40, 524617), (109, 192520), (218, 96260), (436, 48130), (545, 38504), (872, 24065), (1090, 19252), (2180, 9626), (4360, 4813)]