21389830

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{27779}}^1$

素因数の和:27804

約数の個数: 32

約数和(自身を含む): 48003840

約数和(自身を除く): 26614010

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 154, 385, 770, 27779, 55558, 138895, 194453, 277790, 305569, 388906, 611138, 972265, 1527845, 1944530, 2138983, 3055690, 4277966, 10694915, 21389830]

約数ペア:

[(1, 21389830), (2, 10694915), (5, 4277966), (7, 3055690), (10, 2138983), (11, 1944530), (14, 1527845), (22, 972265), (35, 611138), (55, 388906), (70, 305569), (77, 277790), (110, 194453), (154, 138895), (385, 55558), (770, 27779)]