20121017015

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{257}}^1\times {\mathrm{977}}^1$

素因数の和:1328

約数の個数: 64

約数和(自身を含む): 27905015808

約数和(自身を除く): 7783998793

約数列:

[1, 5, 11, 31, 47, 55, 155, 235, 257, 341, 517, 977, 1285, 1457, 1705, 2585, 2827, 4885, 7285, 7967, 10747, 12079, 14135, 16027, 30287, 39835, 45919, 53735, 60395, 80135, 87637, 132869, 151435, 229595, 251089, 333157, 374449, 438185, 505109, 664345, 1255445, 1423489, 1665785, 1872245, 2525545, 2761979, 4118939, 7117445, 7783759, 11801183, 13809895, 15658379, 20594695, 38918795, 59005915, 78291895, 85621349, 129813013, 365836673, 428106745, 649065065, 1829183365, 4024203403, 20121017015]

約数ペア:

[(1, 20121017015), (5, 4024203403), (11, 1829183365), (31, 649065065), (47, 428106745), (55, 365836673), (155, 129813013), (235, 85621349), (257, 78291895), (341, 59005915), (517, 38918795), (977, 20594695), (1285, 15658379), (1457, 13809895), (1705, 11801183), (2585, 7783759), (2827, 7117445), (4885, 4118939), (7285, 2761979), (7967, 2525545), (10747, 1872245), (12079, 1665785), (14135, 1423489), (16027, 1255445), (30287, 664345), (39835, 505109), (45919, 438185), (53735, 374449), (60395, 333157), (80135, 251089), (87637, 229595), (132869, 151435)]