21744681

素因数分解:

$3^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{2791}}^1$

素因数の和:2861

約数の個数: 24

約数和(自身を含む): 34375104

約数和(自身を除く): 12630423

約数列:

[1, 3, 7, 21, 49, 53, 147, 159, 371, 1113, 2597, 2791, 7791, 8373, 19537, 58611, 136759, 147923, 410277, 443769, 1035461, 3106383, 7248227, 21744681]

約数ペア:

[(1, 21744681), (3, 7248227), (7, 3106383), (21, 1035461), (49, 443769), (53, 410277), (147, 147923), (159, 136759), (371, 58611), (1113, 19537), (2597, 8373), (2791, 7791)]