21878045320

素因数分解:

$2^3\times 5^1\times {\mathrm{6491}}^1\times {\mathrm{84263}}^1$

素因数の和:90765

約数の個数: 32

約数和(自身を含む): 49233769920

約数和(自身を除く): 27355724600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 6491, 12982, 25964, 32455, 51928, 64910, 84263, 129820, 168526, 259640, 337052, 421315, 674104, 842630, 1685260, 3370520, 546951133, 1093902266, 2187804532, 2734755665, 4375609064, 5469511330, 10939022660, 21878045320]

約数ペア:

[(1, 21878045320), (2, 10939022660), (4, 5469511330), (5, 4375609064), (8, 2734755665), (10, 2187804532), (20, 1093902266), (40, 546951133), (6491, 3370520), (12982, 1685260), (25964, 842630), (32455, 674104), (51928, 421315), (64910, 337052), (84263, 259640), (129820, 168526)]