21007904

素因数分解:

$2^5\times {\mathrm{139}}^1\times {\mathrm{4723}}^1$

素因数の和:4872

約数の個数: 24

約数和(自身を含む): 41665680

約数和(自身を除く): 20657776

約数列:

[1, 2, 4, 8, 16, 32, 139, 278, 556, 1112, 2224, 4448, 4723, 9446, 18892, 37784, 75568, 151136, 656497, 1312994, 2625988, 5251976, 10503952, 21007904]

約数ペア:

[(1, 21007904), (2, 10503952), (4, 5251976), (8, 2625988), (16, 1312994), (32, 656497), (139, 151136), (278, 75568), (556, 37784), (1112, 18892), (2224, 9446), (4448, 4723)]