21678943

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:223

約数の個数: 32

約数和(自身を含む): 27417600

約数和(自身を除く): 5738657

約数列:

[1, 11, 13, 19, 79, 101, 143, 209, 247, 869, 1027, 1111, 1313, 1501, 1919, 2717, 7979, 11297, 14443, 16511, 19513, 21109, 24947, 87769, 103727, 151601, 214643, 274417, 1140997, 1667611, 1970813, 21678943]

約数ペア:

[(1, 21678943), (11, 1970813), (13, 1667611), (19, 1140997), (79, 274417), (101, 214643), (143, 151601), (209, 103727), (247, 87769), (869, 24947), (1027, 21109), (1111, 19513), (1313, 16511), (1501, 14443), (1919, 11297), (2717, 7979)]