18973799

素因数分解:

${\mathrm{13}}^2\times {\mathrm{19}}^2\times {\mathrm{311}}^1$

素因数の和:375

約数の個数: 18

約数和(自身を含む): 21753576

約数和(自身を除く): 2779777

約数列:

[1, 13, 19, 169, 247, 311, 361, 3211, 4043, 4693, 5909, 52559, 61009, 76817, 112271, 998621, 1459523, 18973799]

約数ペア:

[(1, 18973799), (13, 1459523), (19, 998621), (169, 112271), (247, 76817), (311, 61009), (361, 52559), (3211, 5909), (4043, 4693)]