20915790

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{727}}^1$

素因数の和:881

約数の個数: 64

約数和(自身を含む): 57867264

約数和(自身を除く): 36951474

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 137, 210, 274, 411, 685, 727, 822, 959, 1370, 1454, 1918, 2055, 2181, 2877, 3635, 4110, 4362, 4795, 5089, 5754, 7270, 9590, 10178, 10905, 14385, 15267, 21810, 25445, 28770, 30534, 50890, 76335, 99599, 152670, 199198, 298797, 497995, 597594, 697193, 995990, 1394386, 1493985, 2091579, 2987970, 3485965, 4183158, 6971930, 10457895, 20915790]

約数ペア:

[(1, 20915790), (2, 10457895), (3, 6971930), (5, 4183158), (6, 3485965), (7, 2987970), (10, 2091579), (14, 1493985), (15, 1394386), (21, 995990), (30, 697193), (35, 597594), (42, 497995), (70, 298797), (105, 199198), (137, 152670), (210, 99599), (274, 76335), (411, 50890), (685, 30534), (727, 28770), (822, 25445), (959, 21810), (1370, 15267), (1454, 14385), (1918, 10905), (2055, 10178), (2181, 9590), (2877, 7270), (3635, 5754), (4110, 5089), (4362, 4795)]