21490315

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{55819}}^1$

素因数の和:55842

約数の個数: 16

約数和(自身を含む): 32152320

約数和(自身を除く): 10662005

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 55819, 279095, 390733, 614009, 1953665, 3070045, 4298063, 21490315]

約数ペア:

[(1, 21490315), (5, 4298063), (7, 3070045), (11, 1953665), (35, 614009), (55, 390733), (77, 279095), (385, 55819)]