640517787

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{769}}^1$

素因数の和:914

約数の個数: 80

約数和(自身を含む): 1189594560

約数和(自身を除く): 549076773

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 113, 117, 189, 273, 339, 351, 567, 769, 791, 819, 1017, 1053, 1469, 2307, 2373, 2457, 3051, 4407, 5383, 6921, 7119, 7371, 9153, 9997, 10283, 13221, 16149, 20763, 21357, 29991, 30849, 39663, 48447, 62289, 64071, 69979, 86897, 89973, 92547, 118989, 145341, 209937, 260691, 269919, 277641, 436023, 608279, 629811, 782073, 809757, 832923, 1129661, 1824837, 1889433, 2346219, 3388983, 5474511, 5668299, 7038657, 7907627, 10166949, 16423533, 23722881, 30500847, 49270599, 71168643, 91502541, 213505929, 640517787]

約数ペア:

[(1, 640517787), (3, 213505929), (7, 91502541), (9, 71168643), (13, 49270599), (21, 30500847), (27, 23722881), (39, 16423533), (63, 10166949), (81, 7907627), (91, 7038657), (113, 5668299), (117, 5474511), (189, 3388983), (273, 2346219), (339, 1889433), (351, 1824837), (567, 1129661), (769, 832923), (791, 809757), (819, 782073), (1017, 629811), (1053, 608279), (1469, 436023), (2307, 277641), (2373, 269919), (2457, 260691), (3051, 209937), (4407, 145341), (5383, 118989), (6921, 92547), (7119, 89973), (7371, 86897), (9153, 69979), (9997, 64071), (10283, 62289), (13221, 48447), (16149, 39663), (20763, 30849), (21357, 29991)]