21909855

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{107}}^1$

素因数の和:216

約数の個数: 64

約数和(自身を含む): 41430528

約数和(自身を除く): 19520673

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 73, 85, 107, 165, 187, 219, 255, 321, 365, 535, 561, 803, 935, 1095, 1177, 1241, 1605, 1819, 2409, 2805, 3531, 3723, 4015, 5457, 5885, 6205, 7811, 9095, 12045, 13651, 17655, 18615, 20009, 23433, 27285, 39055, 40953, 60027, 68255, 85921, 100045, 117165, 132787, 204765, 257763, 300135, 398361, 429605, 663935, 1288815, 1460657, 1991805, 4381971, 7303285, 21909855]

約数ペア:

[(1, 21909855), (3, 7303285), (5, 4381971), (11, 1991805), (15, 1460657), (17, 1288815), (33, 663935), (51, 429605), (55, 398361), (73, 300135), (85, 257763), (107, 204765), (165, 132787), (187, 117165), (219, 100045), (255, 85921), (321, 68255), (365, 60027), (535, 40953), (561, 39055), (803, 27285), (935, 23433), (1095, 20009), (1177, 18615), (1241, 17655), (1605, 13651), (1819, 12045), (2409, 9095), (2805, 7811), (3531, 6205), (3723, 5885), (4015, 5457)]