16721978

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{661}}^1$

素因数の和:822

約数の個数: 32

約数和(自身を含む): 31140480

約数和(自身を除く): 14418502

約数列:

[1, 2, 7, 13, 14, 26, 91, 139, 182, 278, 661, 973, 1322, 1807, 1946, 3614, 4627, 8593, 9254, 12649, 17186, 25298, 60151, 91879, 120302, 183758, 643153, 1194427, 1286306, 2388854, 8360989, 16721978]

約数ペア:

[(1, 16721978), (2, 8360989), (7, 2388854), (13, 1286306), (14, 1194427), (26, 643153), (91, 183758), (139, 120302), (182, 91879), (278, 60151), (661, 25298), (973, 17186), (1322, 12649), (1807, 9254), (1946, 8593), (3614, 4627)]