21521547

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{991}}^1$

素因数の和:1143

約数の個数: 24

約数和(自身を含む): 33013760

約数和(自身を除く): 11492213

約数列:

[1, 3, 9, 19, 57, 127, 171, 381, 991, 1143, 2413, 2973, 7239, 8919, 18829, 21717, 56487, 125857, 169461, 377571, 1132713, 2391283, 7173849, 21521547]

約数ペア:

[(1, 21521547), (3, 7173849), (9, 2391283), (19, 1132713), (57, 377571), (127, 169461), (171, 125857), (381, 56487), (991, 21717), (1143, 18829), (2413, 8919), (2973, 7239)]