20945848

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{919}}^1$

素因数の和:980

約数の個数: 64

約数和(自身を含む): 50342400

約数和(自身を除く): 29396552

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 37, 44, 56, 74, 77, 88, 148, 154, 259, 296, 308, 407, 518, 616, 814, 919, 1036, 1628, 1838, 2072, 2849, 3256, 3676, 5698, 6433, 7352, 10109, 11396, 12866, 20218, 22792, 25732, 34003, 40436, 51464, 68006, 70763, 80872, 136012, 141526, 238021, 272024, 283052, 374033, 476042, 566104, 748066, 952084, 1496132, 1904168, 2618231, 2992264, 5236462, 10472924, 20945848]

約数ペア:

[(1, 20945848), (2, 10472924), (4, 5236462), (7, 2992264), (8, 2618231), (11, 1904168), (14, 1496132), (22, 952084), (28, 748066), (37, 566104), (44, 476042), (56, 374033), (74, 283052), (77, 272024), (88, 238021), (148, 141526), (154, 136012), (259, 80872), (296, 70763), (308, 68006), (407, 51464), (518, 40436), (616, 34003), (814, 25732), (919, 22792), (1036, 20218), (1628, 12866), (1838, 11396), (2072, 10109), (2849, 7352), (3256, 6433), (3676, 5698)]