21389640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{178247}}^1$

素因数の和:178261

約数の個数: 32

約数和(自身を含む): 64169280

約数和(自身を除く): 42779640

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 178247, 356494, 534741, 712988, 891235, 1069482, 1425976, 1782470, 2138964, 2673705, 3564940, 4277928, 5347410, 7129880, 10694820, 21389640]

約数ペア:

[(1, 21389640), (2, 10694820), (3, 7129880), (4, 5347410), (5, 4277928), (6, 3564940), (8, 2673705), (10, 2138964), (12, 1782470), (15, 1425976), (20, 1069482), (24, 891235), (30, 712988), (40, 534741), (60, 356494), (120, 178247)]