21911511

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{307}}^1\times {\mathrm{643}}^1$

素因数の和:990

約数の個数: 16

約数和(自身を含む): 30149504

約数和(自身を除く): 8237993

約数列:

[1, 3, 37, 111, 307, 643, 921, 1929, 11359, 23791, 34077, 71373, 197401, 592203, 7303837, 21911511]

約数ペア:

[(1, 21911511), (3, 7303837), (37, 592203), (111, 197401), (307, 71373), (643, 34077), (921, 23791), (1929, 11359)]