19778605

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{179}}^1$

素因数の和:250

約数の個数: 48

約数和(自身を含む): 31026240

約数和(自身を除く): 11247635

約数列:

[1, 5, 7, 11, 35, 41, 49, 55, 77, 179, 205, 245, 287, 385, 451, 539, 895, 1253, 1435, 1969, 2009, 2255, 2695, 3157, 6265, 7339, 8771, 9845, 10045, 13783, 15785, 22099, 36695, 43855, 51373, 68915, 80729, 96481, 110495, 256865, 359611, 403645, 482405, 565103, 1798055, 2825515, 3955721, 19778605]

約数ペア:

[(1, 19778605), (5, 3955721), (7, 2825515), (11, 1798055), (35, 565103), (41, 482405), (49, 403645), (55, 359611), (77, 256865), (179, 110495), (205, 96481), (245, 80729), (287, 68915), (385, 51373), (451, 43855), (539, 36695), (895, 22099), (1253, 15785), (1435, 13783), (1969, 10045), (2009, 9845), (2255, 8771), (2695, 7339), (3157, 6265)]