21680320

素因数分解:

$2^6\times 5^1\times {\mathrm{67751}}^1$

素因数の和:67768

約数の個数: 28

約数和(自身を含む): 51627024

約数和(自身を除く): 29946704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 67751, 135502, 271004, 338755, 542008, 677510, 1084016, 1355020, 2168032, 2710040, 4336064, 5420080, 10840160, 21680320]

約数ペア:

[(1, 21680320), (2, 10840160), (4, 5420080), (5, 4336064), (8, 2710040), (10, 2168032), (16, 1355020), (20, 1084016), (32, 677510), (40, 542008), (64, 338755), (80, 271004), (160, 135502), (320, 67751)]