21078880

素因数分解:

$2^5\times 5^1\times {\mathrm{131743}}^1$

素因数の和:131758

約数の個数: 24

約数和(自身を含む): 49799232

約数和(自身を除く): 28720352

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 131743, 263486, 526972, 658715, 1053944, 1317430, 2107888, 2634860, 4215776, 5269720, 10539440, 21078880]

約数ペア:

[(1, 21078880), (2, 10539440), (4, 5269720), (5, 4215776), (8, 2634860), (10, 2107888), (16, 1317430), (20, 1053944), (32, 658715), (40, 526972), (80, 263486), (160, 131743)]