20471997

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1$

素因数の和:154

約数の個数: 64

約数和(自身を含む): 36126720

約数和(自身を除く): 15654723

約数列:

[1, 3, 7, 13, 21, 31, 39, 41, 59, 91, 93, 123, 177, 217, 273, 287, 403, 413, 533, 651, 767, 861, 1209, 1239, 1271, 1599, 1829, 2301, 2419, 2821, 3731, 3813, 5369, 5487, 7257, 8463, 8897, 11193, 12803, 16107, 16523, 16933, 23777, 26691, 31447, 38409, 49569, 50799, 71331, 74989, 94341, 115661, 166439, 220129, 224967, 346983, 499317, 524923, 660387, 974857, 1574769, 2924571, 6823999, 20471997]

約数ペア:

[(1, 20471997), (3, 6823999), (7, 2924571), (13, 1574769), (21, 974857), (31, 660387), (39, 524923), (41, 499317), (59, 346983), (91, 224967), (93, 220129), (123, 166439), (177, 115661), (217, 94341), (273, 74989), (287, 71331), (403, 50799), (413, 49569), (533, 38409), (651, 31447), (767, 26691), (861, 23777), (1209, 16933), (1239, 16523), (1271, 16107), (1599, 12803), (1829, 11193), (2301, 8897), (2419, 8463), (2821, 7257), (3731, 5487), (3813, 5369)]