21284853

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{263}}^1\times {\mathrm{509}}^1$

素因数の和:828

約数の個数: 16

約数和(自身を含む): 29082240

約数和(自身を除く): 7797387

約数列:

[1, 3, 53, 159, 263, 509, 789, 1527, 13939, 26977, 41817, 80931, 133867, 401601, 7094951, 21284853]

約数ペア:

[(1, 21284853), (3, 7094951), (53, 401601), (159, 133867), (263, 80931), (509, 41817), (789, 26977), (1527, 13939)]