16881921

素因数分解:

$3^2\times 7^2\times {\mathrm{38281}}^1$

素因数の和:38301

約数の個数: 18

約数和(自身を含む): 28366962

約数和(自身を除く): 11485041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 38281, 114843, 267967, 344529, 803901, 1875769, 2411703, 5627307, 16881921]

約数ペア:

[(1, 16881921), (3, 5627307), (7, 2411703), (9, 1875769), (21, 803901), (49, 344529), (63, 267967), (147, 114843), (441, 38281)]