20887035

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:164

約数の個数: 64

約数和(自身を含む): 38320128

約数和(自身を除く): 17433093

約数列:

[1, 3, 5, 13, 15, 39, 43, 47, 53, 65, 129, 141, 159, 195, 215, 235, 265, 559, 611, 645, 689, 705, 795, 1677, 1833, 2021, 2067, 2279, 2491, 2795, 3055, 3445, 6063, 6837, 7473, 8385, 9165, 10105, 10335, 11395, 12455, 26273, 29627, 30315, 32383, 34185, 37365, 78819, 88881, 97149, 107113, 131365, 148135, 161915, 321339, 394095, 444405, 485745, 535565, 1392469, 1606695, 4177407, 6962345, 20887035]

約数ペア:

[(1, 20887035), (3, 6962345), (5, 4177407), (13, 1606695), (15, 1392469), (39, 535565), (43, 485745), (47, 444405), (53, 394095), (65, 321339), (129, 161915), (141, 148135), (159, 131365), (195, 107113), (215, 97149), (235, 88881), (265, 78819), (559, 37365), (611, 34185), (645, 32383), (689, 30315), (705, 29627), (795, 26273), (1677, 12455), (1833, 11395), (2021, 10335), (2067, 10105), (2279, 9165), (2491, 8385), (2795, 7473), (3055, 6837), (3445, 6063)]