80459990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{397}}^1\times {\mathrm{1559}}^1$

素因数の和:1976

約数の個数: 32

約数和(自身を含む): 156461760

約数和(自身を除く): 76001770

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 397, 794, 1559, 1985, 3118, 3970, 5161, 7795, 10322, 15590, 20267, 25805, 40534, 51610, 101335, 202670, 618923, 1237846, 3094615, 6189230, 8045999, 16091998, 40229995, 80459990]

約数ペア:

[(1, 80459990), (2, 40229995), (5, 16091998), (10, 8045999), (13, 6189230), (26, 3094615), (65, 1237846), (130, 618923), (397, 202670), (794, 101335), (1559, 51610), (1985, 40534), (3118, 25805), (3970, 20267), (5161, 15590), (7795, 10322)]