1991209120

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{655003}}^1$

素因数の和:655037

約数の個数: 48

約数和(自身を含む): 4951830240

約数和(自身を除く): 2960621120

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 655003, 1310006, 2620012, 3275015, 5240024, 6550030, 10480048, 12445057, 13100060, 20960096, 24890114, 26200120, 49780228, 52400240, 62225285, 99560456, 104800480, 124450570, 199120912, 248901140, 398241824, 497802280, 995604560, 1991209120]

約数ペア:

[(1, 1991209120), (2, 995604560), (4, 497802280), (5, 398241824), (8, 248901140), (10, 199120912), (16, 124450570), (19, 104800480), (20, 99560456), (32, 62225285), (38, 52400240), (40, 49780228), (76, 26200120), (80, 24890114), (95, 20960096), (152, 13100060), (160, 12445057), (190, 10480048), (304, 6550030), (380, 5240024), (608, 3275015), (760, 2620012), (1520, 1310006), (3040, 655003)]