21279520

素因数分解:

$2^5\times 5^1\times {\mathrm{179}}^1\times {\mathrm{743}}^1$

素因数の和:937

約数の個数: 48

約数和(自身を含む): 50621760

約数和(自身を除く): 29342240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 179, 358, 716, 743, 895, 1432, 1486, 1790, 2864, 2972, 3580, 3715, 5728, 5944, 7160, 7430, 11888, 14320, 14860, 23776, 28640, 29720, 59440, 118880, 132997, 265994, 531988, 664985, 1063976, 1329970, 2127952, 2659940, 4255904, 5319880, 10639760, 21279520]

約数ペア:

[(1, 21279520), (2, 10639760), (4, 5319880), (5, 4255904), (8, 2659940), (10, 2127952), (16, 1329970), (20, 1063976), (32, 664985), (40, 531988), (80, 265994), (160, 132997), (179, 118880), (358, 59440), (716, 29720), (743, 28640), (895, 23776), (1432, 14860), (1486, 14320), (1790, 11888), (2864, 7430), (2972, 7160), (3580, 5944), (3715, 5728)]