21074013

素因数分解:

$3^4\times {\mathrm{151}}^1\times {\mathrm{1723}}^1$

素因数の和:1886

約数の個数: 20

約数和(自身を含む): 31707808

約数和(自身を除く): 10633795

約数列:

[1, 3, 9, 27, 81, 151, 453, 1359, 1723, 4077, 5169, 12231, 15507, 46521, 139563, 260173, 780519, 2341557, 7024671, 21074013]

約数ペア:

[(1, 21074013), (3, 7024671), (9, 2341557), (27, 780519), (81, 260173), (151, 139563), (453, 46521), (1359, 15507), (1723, 12231), (4077, 5169)]