18897921

素因数分解:

$3^3\times 7^1\times {\mathrm{99989}}^1$

素因数の和:100005

約数の個数: 16

約数和(自身を含む): 31996800

約数和(自身を除く): 13098879

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 99989, 299967, 699923, 899901, 2099769, 2699703, 6299307, 18897921]

約数ペア:

[(1, 18897921), (3, 6299307), (7, 2699703), (9, 2099769), (21, 899901), (27, 699923), (63, 299967), (189, 99989)]