19866865

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1\times {\mathrm{293}}^1$

素因数の和:560

約数の個数: 16

約数和(自身を含む): 24385536

約数和(自身を除く): 4518671

約数列:

[1, 5, 71, 191, 293, 355, 955, 1465, 13561, 20803, 55963, 67805, 104015, 279815, 3973373, 19866865]

約数ペア:

[(1, 19866865), (5, 3973373), (71, 279815), (191, 104015), (293, 67805), (355, 55963), (955, 20803), (1465, 13561)]