638001

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1$

素因数の和:86

約数の個数: 48

約数和(自身を含む): 1223040

約数和(自身を除く): 585039

約数列:

[1, 3, 7, 9, 13, 19, 21, 39, 41, 57, 63, 91, 117, 123, 133, 171, 247, 273, 287, 369, 399, 533, 741, 779, 819, 861, 1197, 1599, 1729, 2223, 2337, 2583, 3731, 4797, 5187, 5453, 7011, 10127, 11193, 15561, 16359, 30381, 33579, 49077, 70889, 91143, 212667, 638001]

約数ペア:

[(1, 638001), (3, 212667), (7, 91143), (9, 70889), (13, 49077), (19, 33579), (21, 30381), (39, 16359), (41, 15561), (57, 11193), (63, 10127), (91, 7011), (117, 5453), (123, 5187), (133, 4797), (171, 3731), (247, 2583), (273, 2337), (287, 2223), (369, 1729), (399, 1599), (533, 1197), (741, 861), (779, 819)]