21030921

素因数分解:

$3^6\times {\mathrm{17}}^1\times {\mathrm{1697}}^1$

素因数の和:1732

約数の個数: 28

約数和(自身を含む): 33406452

約数和(自身を除く): 12375531

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 243, 459, 729, 1377, 1697, 4131, 5091, 12393, 15273, 28849, 45819, 86547, 137457, 259641, 412371, 778923, 1237113, 2336769, 7010307, 21030921]

約数ペア:

[(1, 21030921), (3, 7010307), (9, 2336769), (17, 1237113), (27, 778923), (51, 412371), (81, 259641), (153, 137457), (243, 86547), (459, 45819), (729, 28849), (1377, 15273), (1697, 12393), (4131, 5091)]