18944919

素因数分解:

$3^2\times 7^3\times {\mathrm{17}}^1\times {\mathrm{19}}^2$

素因数の和:82

約数の個数: 72

約数和(自身を含む): 35661600

約数和(自身を除く): 16716681

約数列:

[1, 3, 7, 9, 17, 19, 21, 49, 51, 57, 63, 119, 133, 147, 153, 171, 323, 343, 357, 361, 399, 441, 833, 931, 969, 1029, 1071, 1083, 1197, 2261, 2499, 2527, 2793, 2907, 3087, 3249, 5831, 6137, 6517, 6783, 7497, 7581, 8379, 15827, 17493, 17689, 18411, 19551, 20349, 22743, 42959, 47481, 52479, 53067, 55233, 58653, 110789, 123823, 128877, 142443, 159201, 300713, 332367, 371469, 386631, 902139, 997101, 1114407, 2104991, 2706417, 6314973, 18944919]

約数ペア:

[(1, 18944919), (3, 6314973), (7, 2706417), (9, 2104991), (17, 1114407), (19, 997101), (21, 902139), (49, 386631), (51, 371469), (57, 332367), (63, 300713), (119, 159201), (133, 142443), (147, 128877), (153, 123823), (171, 110789), (323, 58653), (343, 55233), (357, 53067), (361, 52479), (399, 47481), (441, 42959), (833, 22743), (931, 20349), (969, 19551), (1029, 18411), (1071, 17689), (1083, 17493), (1197, 15827), (2261, 8379), (2499, 7581), (2527, 7497), (2793, 6783), (2907, 6517), (3087, 6137), (3249, 5831)]