20697495

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{257}}^1$

素因数の和:344

約数の個数: 64

約数和(自身を含む): 41610240

約数和(自身を除く): 20912745

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 59, 65, 91, 105, 177, 195, 257, 273, 295, 413, 455, 767, 771, 885, 1239, 1285, 1365, 1799, 2065, 2301, 3341, 3835, 3855, 5369, 5397, 6195, 8995, 10023, 11505, 15163, 16107, 16705, 23387, 26845, 26985, 45489, 50115, 70161, 75815, 80535, 106141, 116935, 197119, 227445, 318423, 350805, 530705, 591357, 985595, 1379833, 1592115, 2956785, 4139499, 6899165, 20697495]

約数ペア:

[(1, 20697495), (3, 6899165), (5, 4139499), (7, 2956785), (13, 1592115), (15, 1379833), (21, 985595), (35, 591357), (39, 530705), (59, 350805), (65, 318423), (91, 227445), (105, 197119), (177, 116935), (195, 106141), (257, 80535), (273, 75815), (295, 70161), (413, 50115), (455, 45489), (767, 26985), (771, 26845), (885, 23387), (1239, 16705), (1285, 16107), (1365, 15163), (1799, 11505), (2065, 10023), (2301, 8995), (3341, 6195), (3835, 5397), (3855, 5369)]