20198408825

素因数分解:

$5^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{241}}^1\times {\mathrm{2207}}^1$

素因数の和:2503

約数の個数: 72

約数和(自身を含む): 30213494784

約数和(自身を除く): 10015085959

約数列:

[1, 5, 7, 25, 31, 35, 49, 155, 175, 217, 241, 245, 775, 1085, 1205, 1225, 1519, 1687, 2207, 5425, 6025, 7471, 7595, 8435, 11035, 11809, 15449, 37355, 37975, 42175, 52297, 55175, 59045, 68417, 77245, 108143, 186775, 261485, 295225, 342085, 366079, 386225, 478919, 531887, 540715, 1307425, 1710425, 1830395, 2394595, 2659435, 2703575, 3352433, 3723209, 9151975, 11972975, 13297175, 16488497, 16762165, 18616045, 26062463, 82442485, 83810825, 93080225, 115419479, 130312315, 412212425, 577097395, 651561575, 807936353, 2885486975, 4039681765, 20198408825]

約数ペア:

[(1, 20198408825), (5, 4039681765), (7, 2885486975), (25, 807936353), (31, 651561575), (35, 577097395), (49, 412212425), (155, 130312315), (175, 115419479), (217, 93080225), (241, 83810825), (245, 82442485), (775, 26062463), (1085, 18616045), (1205, 16762165), (1225, 16488497), (1519, 13297175), (1687, 11972975), (2207, 9151975), (5425, 3723209), (6025, 3352433), (7471, 2703575), (7595, 2659435), (8435, 2394595), (11035, 1830395), (11809, 1710425), (15449, 1307425), (37355, 540715), (37975, 531887), (42175, 478919), (52297, 386225), (55175, 366079), (59045, 342085), (68417, 295225), (77245, 261485), (108143, 186775)]