1991998

素因数分解:

$2^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{89}}^1$

素因数の和:160

約数の個数: 24

約数和(自身を含む): 3291840

約数和(自身を除く): 1299842

約数列:

[1, 2, 19, 31, 38, 62, 89, 178, 361, 589, 722, 1178, 1691, 2759, 3382, 5518, 11191, 22382, 32129, 52421, 64258, 104842, 995999, 1991998]

約数ペア:

[(1, 1991998), (2, 995999), (19, 104842), (31, 64258), (38, 52421), (62, 32129), (89, 22382), (178, 11191), (361, 5518), (589, 3382), (722, 2759), (1178, 1691)]