640205676

素因数分解:

$2^2\times 3^2\times {\mathrm{11}}^3\times {\mathrm{31}}^1\times {\mathrm{431}}^1$

素因数の和:505

約数の個数: 144

約数和(自身を含む): 1841688576

約数和(自身を除く): 1201482900

約数列:

[1, 2, 3, 4, 6, 9, 11, 12, 18, 22, 31, 33, 36, 44, 62, 66, 93, 99, 121, 124, 132, 186, 198, 242, 279, 341, 363, 372, 396, 431, 484, 558, 682, 726, 862, 1023, 1089, 1116, 1293, 1331, 1364, 1452, 1724, 2046, 2178, 2586, 2662, 3069, 3751, 3879, 3993, 4092, 4356, 4741, 5172, 5324, 6138, 7502, 7758, 7986, 9482, 11253, 11979, 12276, 13361, 14223, 15004, 15516, 15972, 18964, 22506, 23958, 26722, 28446, 33759, 40083, 41261, 42669, 45012, 47916, 52151, 53444, 56892, 67518, 80166, 82522, 85338, 104302, 120249, 123783, 135036, 146971, 156453, 160332, 165044, 170676, 208604, 240498, 247566, 293942, 312906, 371349, 440913, 469359, 480996, 495132, 573661, 587884, 625812, 742698, 881826, 938718, 1147322, 1322739, 1485396, 1616681, 1720983, 1763652, 1877436, 2294644, 2645478, 3233362, 3441966, 4850043, 5162949, 5290956, 6466724, 6883932, 9700086, 10325898, 14550129, 17783491, 19400172, 20651796, 29100258, 35566982, 53350473, 58200516, 71133964, 106700946, 160051419, 213401892, 320102838, 640205676]

約数ペア:

[(1, 640205676), (2, 320102838), (3, 213401892), (4, 160051419), (6, 106700946), (9, 71133964), (11, 58200516), (12, 53350473), (18, 35566982), (22, 29100258), (31, 20651796), (33, 19400172), (36, 17783491), (44, 14550129), (62, 10325898), (66, 9700086), (93, 6883932), (99, 6466724), (121, 5290956), (124, 5162949), (132, 4850043), (186, 3441966), (198, 3233362), (242, 2645478), (279, 2294644), (341, 1877436), (363, 1763652), (372, 1720983), (396, 1616681), (431, 1485396), (484, 1322739), (558, 1147322), (682, 938718), (726, 881826), (862, 742698), (1023, 625812), (1089, 587884), (1116, 573661), (1293, 495132), (1331, 480996), (1364, 469359), (1452, 440913), (1724, 371349), (2046, 312906), (2178, 293942), (2586, 247566), (2662, 240498), (3069, 208604), (3751, 170676), (3879, 165044), (3993, 160332), (4092, 156453), (4356, 146971), (4741, 135036), (5172, 123783), (5324, 120249), (6138, 104302), (7502, 85338), (7758, 82522), (7986, 80166), (9482, 67518), (11253, 56892), (11979, 53444), (12276, 52151), (13361, 47916), (14223, 45012), (15004, 42669), (15516, 41261), (15972, 40083), (18964, 33759), (22506, 28446), (23958, 26722)]