21344440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41047}}^1$

素因数の和:41071

約数の個数: 32

約数和(自身を含む): 51720480

約数和(自身を除く): 30376040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41047, 82094, 164188, 205235, 328376, 410470, 533611, 820940, 1067222, 1641880, 2134444, 2668055, 4268888, 5336110, 10672220, 21344440]

約数ペア:

[(1, 21344440), (2, 10672220), (4, 5336110), (5, 4268888), (8, 2668055), (10, 2134444), (13, 1641880), (20, 1067222), (26, 820940), (40, 533611), (52, 410470), (65, 328376), (104, 205235), (130, 164188), (260, 82094), (520, 41047)]