18910364

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{89}}^1\times {\mathrm{439}}^1$

素因数の和:554

約数の個数: 36

約数和(自身を含む): 36867600

約数和(自身を除く): 17957236

約数列:

[1, 2, 4, 11, 22, 44, 89, 121, 178, 242, 356, 439, 484, 878, 979, 1756, 1958, 3916, 4829, 9658, 10769, 19316, 21538, 39071, 43076, 53119, 78142, 106238, 156284, 212476, 429781, 859562, 1719124, 4727591, 9455182, 18910364]

約数ペア:

[(1, 18910364), (2, 9455182), (4, 4727591), (11, 1719124), (22, 859562), (44, 429781), (89, 212476), (121, 156284), (178, 106238), (242, 78142), (356, 53119), (439, 43076), (484, 39071), (878, 21538), (979, 19316), (1756, 10769), (1958, 9658), (3916, 4829)]