21000251968

素因数分解:

$2^6\times {\mathrm{277}}^1\times {\mathrm{577}}^1\times {\mathrm{2053}}^1$

素因数の和:2919

約数の個数: 56

約数和(自身を含む): 41915706872

約数和(自身を除く): 20915454904

約数列:

[1, 2, 4, 8, 16, 32, 64, 277, 554, 577, 1108, 1154, 2053, 2216, 2308, 4106, 4432, 4616, 8212, 8864, 9232, 16424, 17728, 18464, 32848, 36928, 65696, 131392, 159829, 319658, 568681, 639316, 1137362, 1184581, 1278632, 2274724, 2369162, 2557264, 4549448, 4738324, 5114528, 9098896, 9476648, 10229056, 18197792, 18953296, 36395584, 37906592, 75813184, 328128937, 656257874, 1312515748, 2625031496, 5250062992, 10500125984, 21000251968]

約数ペア:

[(1, 21000251968), (2, 10500125984), (4, 5250062992), (8, 2625031496), (16, 1312515748), (32, 656257874), (64, 328128937), (277, 75813184), (554, 37906592), (577, 36395584), (1108, 18953296), (1154, 18197792), (2053, 10229056), (2216, 9476648), (2308, 9098896), (4106, 5114528), (4432, 4738324), (4616, 4549448), (8212, 2557264), (8864, 2369162), (9232, 2274724), (16424, 1278632), (17728, 1184581), (18464, 1137362), (32848, 639316), (36928, 568681), (65696, 319658), (131392, 159829)]