199987921

素因数分解:

$7^1\times {\mathrm{23}}^2\times {\mathrm{53}}^1\times {\mathrm{1019}}^1$

素因数の和:1125

約数の個数: 24

約数和(自身を含む): 243673920

約数和(自身を除く): 43685999

約数列:

[1, 7, 23, 53, 161, 371, 529, 1019, 1219, 3703, 7133, 8533, 23437, 28037, 54007, 164059, 196259, 378049, 539051, 1242161, 3773357, 8695127, 28569703, 199987921]

約数ペア:

[(1, 199987921), (7, 28569703), (23, 8695127), (53, 3773357), (161, 1242161), (371, 539051), (529, 378049), (1019, 196259), (1219, 164059), (3703, 54007), (7133, 28037), (8533, 23437)]