19930491

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 34504704

約数和(自身を除く): 14574213

約数列:

[1, 3, 7, 9, 21, 47, 53, 63, 127, 141, 159, 329, 371, 381, 423, 477, 889, 987, 1113, 1143, 2491, 2667, 2961, 3339, 5969, 6731, 7473, 8001, 17437, 17907, 20193, 22419, 41783, 47117, 52311, 53721, 60579, 125349, 141351, 156933, 316357, 376047, 424053, 949071, 2214499, 2847213, 6643497, 19930491]

約数ペア:

[(1, 19930491), (3, 6643497), (7, 2847213), (9, 2214499), (21, 949071), (47, 424053), (53, 376047), (63, 316357), (127, 156933), (141, 141351), (159, 125349), (329, 60579), (371, 53721), (381, 52311), (423, 47117), (477, 41783), (889, 22419), (987, 20193), (1113, 17907), (1143, 17437), (2491, 8001), (2667, 7473), (2961, 6731), (3339, 5969)]