20121821

素因数分解:

${\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{331}}^1$

素因数の和:452

約数の個数: 16

約数和(自身を含む): 21800448

約数和(自身を除く): 1678627

約数列:

[1, 31, 37, 53, 331, 1147, 1643, 1961, 10261, 12247, 17543, 60791, 379657, 543833, 649091, 20121821]

約数ペア:

[(1, 20121821), (31, 649091), (37, 543833), (53, 379657), (331, 60791), (1147, 17543), (1643, 12247), (1961, 10261)]