19903975

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{673}}^1$

素因数の和:716

約数の個数: 36

約数和(自身を含む): 30588816

約数和(自身を除く): 10684841

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 169, 175, 325, 455, 673, 845, 1183, 2275, 3365, 4225, 4711, 5915, 8749, 16825, 23555, 29575, 43745, 61243, 113737, 117775, 218725, 306215, 568685, 796159, 1531075, 2843425, 3980795, 19903975]

約数ペア:

[(1, 19903975), (5, 3980795), (7, 2843425), (13, 1531075), (25, 796159), (35, 568685), (65, 306215), (91, 218725), (169, 117775), (175, 113737), (325, 61243), (455, 43745), (673, 29575), (845, 23555), (1183, 16825), (2275, 8749), (3365, 5915), (4225, 4711)]