20010501

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 34664448

約数和(自身を除く): 14653947

約数列:

[1, 3, 7, 9, 21, 41, 61, 63, 123, 127, 183, 287, 369, 381, 427, 549, 861, 889, 1143, 1281, 2501, 2583, 2667, 3843, 5207, 7503, 7747, 8001, 15621, 17507, 22509, 23241, 36449, 46863, 52521, 54229, 69723, 109347, 157563, 162687, 317627, 328041, 488061, 952881, 2223389, 2858643, 6670167, 20010501]

約数ペア:

[(1, 20010501), (3, 6670167), (7, 2858643), (9, 2223389), (21, 952881), (41, 488061), (61, 328041), (63, 317627), (123, 162687), (127, 157563), (183, 109347), (287, 69723), (369, 54229), (381, 52521), (427, 46863), (549, 36449), (861, 23241), (889, 22509), (1143, 17507), (1281, 15621), (2501, 8001), (2583, 7747), (2667, 7503), (3843, 5207)]