21378412

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{5009}}^1$

素因数の和:5121

約数の個数: 24

約数和(自身を含む): 41242320

約数和(自身を除く): 19863908

約数列:

[1, 2, 4, 11, 22, 44, 97, 194, 388, 1067, 2134, 4268, 5009, 10018, 20036, 55099, 110198, 220396, 485873, 971746, 1943492, 5344603, 10689206, 21378412]

約数ペア:

[(1, 21378412), (2, 10689206), (4, 5344603), (11, 1943492), (22, 971746), (44, 485873), (97, 220396), (194, 110198), (388, 55099), (1067, 20036), (2134, 10018), (4268, 5009)]