31540120

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2027}}^1$

素因数の和:2427

約数の個数: 32

約数和(自身を含む): 71182800

約数和(自身を除く): 39642680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1556, 1945, 2027, 3112, 3890, 4054, 7780, 8108, 10135, 15560, 16216, 20270, 40540, 81080, 788503, 1577006, 3154012, 3942515, 6308024, 7885030, 15770060, 31540120]

約数ペア:

[(1, 31540120), (2, 15770060), (4, 7885030), (5, 6308024), (8, 3942515), (10, 3154012), (20, 1577006), (40, 788503), (389, 81080), (778, 40540), (1556, 20270), (1945, 16216), (2027, 15560), (3112, 10135), (3890, 8108), (4054, 7780)]