21336016

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1531}}^1$

素因数の和:1619

約数の個数: 40

約数和(自身を含む): 45212384

約数和(自身を除く): 23876368

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 134, 208, 268, 536, 871, 1072, 1531, 1742, 3062, 3484, 6124, 6968, 12248, 13936, 19903, 24496, 39806, 79612, 102577, 159224, 205154, 318448, 410308, 820616, 1333501, 1641232, 2667002, 5334004, 10668008, 21336016]

約数ペア:

[(1, 21336016), (2, 10668008), (4, 5334004), (8, 2667002), (13, 1641232), (16, 1333501), (26, 820616), (52, 410308), (67, 318448), (104, 205154), (134, 159224), (208, 102577), (268, 79612), (536, 39806), (871, 24496), (1072, 19903), (1531, 13936), (1742, 12248), (3062, 6968), (3484, 6124)]