18204921

素因数分解:

$3^2\times 7^2\times {\mathrm{41281}}^1$

素因数の和:41301

約数の個数: 18

約数和(自身を含む): 30589962

約数和(自身を除く): 12385041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 41281, 123843, 288967, 371529, 866901, 2022769, 2600703, 6068307, 18204921]

約数ペア:

[(1, 18204921), (3, 6068307), (7, 2600703), (9, 2022769), (21, 866901), (49, 371529), (63, 288967), (147, 123843), (441, 41281)]