21003867

素因数分解:

$3^4\times {\mathrm{349}}^1\times {\mathrm{743}}^1$

素因数の和:1104

約数の個数: 20

約数和(自身を含む): 31508400

約数和(自身を除く): 10504533

約数列:

[1, 3, 9, 27, 81, 349, 743, 1047, 2229, 3141, 6687, 9423, 20061, 28269, 60183, 259307, 777921, 2333763, 7001289, 21003867]

約数ペア:

[(1, 21003867), (3, 7001289), (9, 2333763), (27, 777921), (81, 259307), (349, 60183), (743, 28269), (1047, 20061), (2229, 9423), (3141, 6687)]