19917788

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{4153}}^1$

素因数の和:4277

約数の個数: 24

約数和(自身を含む): 38382960

約数和(自身を除く): 18465172

約数列:

[1, 2, 4, 11, 22, 44, 109, 218, 436, 1199, 2398, 4153, 4796, 8306, 16612, 45683, 91366, 182732, 452677, 905354, 1810708, 4979447, 9958894, 19917788]

約数ペア:

[(1, 19917788), (2, 9958894), (4, 4979447), (11, 1810708), (22, 905354), (44, 452677), (109, 182732), (218, 91366), (436, 45683), (1199, 16612), (2398, 8306), (4153, 4796)]