21999873

素因数分解:

$3^1\times 7^2\times {\mathrm{103}}^1\times {\mathrm{1453}}^1$

素因数の和:1573

約数の個数: 24

約数和(自身を含む): 34477248

約数和(自身を除く): 12477375

約数列:

[1, 3, 7, 21, 49, 103, 147, 309, 721, 1453, 2163, 4359, 5047, 10171, 15141, 30513, 71197, 149659, 213591, 448977, 1047613, 3142839, 7333291, 21999873]

約数ペア:

[(1, 21999873), (3, 7333291), (7, 3142839), (21, 1047613), (49, 448977), (103, 213591), (147, 149659), (309, 71197), (721, 30513), (1453, 15141), (2163, 10171), (4359, 5047)]