991921

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:192

約数の個数: 16

約数和(自身を含む): 1214208

約数和(自身を除く): 222287

約数列:

[1, 7, 23, 61, 101, 161, 427, 707, 1403, 2323, 6161, 9821, 16261, 43127, 141703, 991921]

約数ペア:

[(1, 991921), (7, 141703), (23, 43127), (61, 16261), (101, 9821), (161, 6161), (427, 2323), (707, 1403)]