21671756

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{137}}^1\times {\mathrm{557}}^1$

素因数の和:769

約数の個数: 24

約数和(自身を含む): 38810016

約数和(自身を除く): 17138260

約数列:

[1, 2, 4, 71, 137, 142, 274, 284, 548, 557, 1114, 2228, 9727, 19454, 38908, 39547, 76309, 79094, 152618, 158188, 305236, 5417939, 10835878, 21671756]

約数ペア:

[(1, 21671756), (2, 10835878), (4, 5417939), (71, 305236), (137, 158188), (142, 152618), (274, 79094), (284, 76309), (548, 39547), (557, 38908), (1114, 19454), (2228, 9727)]