21392470

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{439}}^1\times {\mathrm{443}}^1$

素因数の和:900

約数の個数: 32

約数和(自身を含む): 42197760

約数和(自身を除く): 20805290

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 439, 443, 878, 886, 2195, 2215, 4390, 4430, 4829, 4873, 9658, 9746, 24145, 24365, 48290, 48730, 194477, 388954, 972385, 1944770, 2139247, 4278494, 10696235, 21392470]

約数ペア:

[(1, 21392470), (2, 10696235), (5, 4278494), (10, 2139247), (11, 1944770), (22, 972385), (55, 388954), (110, 194477), (439, 48730), (443, 48290), (878, 24365), (886, 24145), (2195, 9746), (2215, 9658), (4390, 4873), (4430, 4829)]