21654412

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{4679}}^1$

素因数の和:4785

約数の個数: 24

約数和(自身を含む): 41277600

約数和(自身を除く): 19623188

約数列:

[1, 2, 4, 13, 26, 52, 89, 178, 356, 1157, 2314, 4628, 4679, 9358, 18716, 60827, 121654, 243308, 416431, 832862, 1665724, 5413603, 10827206, 21654412]

約数ペア:

[(1, 21654412), (2, 10827206), (4, 5413603), (13, 1665724), (26, 832862), (52, 416431), (89, 243308), (178, 121654), (356, 60827), (1157, 18716), (2314, 9358), (4628, 4679)]