820508255

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1\times {\mathrm{179}}^1$

素因数の和:384

約数の個数: 64

約数和(自身を含む): 1221350400

約数和(自身を除く): 400842145

約数列:

[1, 5, 7, 19, 35, 61, 95, 113, 133, 179, 305, 427, 565, 665, 791, 895, 1159, 1253, 2135, 2147, 3401, 3955, 5795, 6265, 6893, 8113, 10735, 10919, 15029, 17005, 20227, 23807, 34465, 40565, 48251, 54595, 75145, 76433, 101135, 119035, 130967, 141589, 207461, 241255, 382165, 384313, 654835, 707945, 916769, 1037305, 1233847, 1452227, 1921565, 2690191, 4583845, 6169235, 7261135, 8636929, 13450955, 23443093, 43184645, 117215465, 164101651, 820508255]

約数ペア:

[(1, 820508255), (5, 164101651), (7, 117215465), (19, 43184645), (35, 23443093), (61, 13450955), (95, 8636929), (113, 7261135), (133, 6169235), (179, 4583845), (305, 2690191), (427, 1921565), (565, 1452227), (665, 1233847), (791, 1037305), (895, 916769), (1159, 707945), (1253, 654835), (2135, 384313), (2147, 382165), (3401, 241255), (3955, 207461), (5795, 141589), (6265, 130967), (6893, 119035), (8113, 101135), (10735, 76433), (10919, 75145), (15029, 54595), (17005, 48251), (20227, 40565), (23807, 34465)]