21050523

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{19991}}^1$

素因数の和:20016

約数の個数: 20

約数和(自身を含む): 33866448

約数和(自身を除く): 12815925

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 19991, 59973, 179919, 259883, 539757, 779649, 1619271, 2338947, 7016841, 21050523]

約数ペア:

[(1, 21050523), (3, 7016841), (9, 2338947), (13, 1619271), (27, 779649), (39, 539757), (81, 259883), (117, 179919), (351, 59973), (1053, 19991)]