18881289

素因数分解:

$3^3\times 7^1\times {\mathrm{99901}}^1$

素因数の和:99917

約数の個数: 16

約数和(自身を含む): 31968640

約数和(自身を除く): 13087351

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 99901, 299703, 699307, 899109, 2097921, 2697327, 6293763, 18881289]

約数ペア:

[(1, 18881289), (3, 6293763), (7, 2697327), (9, 2097921), (21, 899109), (27, 699307), (63, 299703), (189, 99901)]