19019975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1361}}^1$

素因数の和:1427

約数の個数: 24

約数和(自身を含む): 26008752

約数和(自身を除く): 6988777

約数列:

[1, 5, 13, 25, 43, 65, 215, 325, 559, 1075, 1361, 2795, 6805, 13975, 17693, 34025, 58523, 88465, 292615, 442325, 760799, 1463075, 3803995, 19019975]

約数ペア:

[(1, 19019975), (5, 3803995), (13, 1463075), (25, 760799), (43, 442325), (65, 292615), (215, 88465), (325, 58523), (559, 34025), (1075, 17693), (1361, 13975), (2795, 6805)]