18969867

素因数分解:

$3^2\times 7^1\times {\mathrm{353}}^1\times {\mathrm{853}}^1$

素因数の和:1219

約数の個数: 24

約数和(自身を含む): 31440864

約数和(自身を除く): 12470997

約数列:

[1, 3, 7, 9, 21, 63, 353, 853, 1059, 2471, 2559, 3177, 5971, 7413, 7677, 17913, 22239, 53739, 301109, 903327, 2107763, 2709981, 6323289, 18969867]

約数ペア:

[(1, 18969867), (3, 6323289), (7, 2709981), (9, 2107763), (21, 903327), (63, 301109), (353, 53739), (853, 22239), (1059, 17913), (2471, 7677), (2559, 7413), (3177, 5971)]