21306896

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102437}}^1$

素因数の和:102458

約数の個数: 20

約数和(自身を含む): 44458092

約数和(自身を除く): 23151196

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102437, 204874, 409748, 819496, 1331681, 1638992, 2663362, 5326724, 10653448, 21306896]

約数ペア:

[(1, 21306896), (2, 10653448), (4, 5326724), (8, 2663362), (13, 1638992), (16, 1331681), (26, 819496), (52, 409748), (104, 204874), (208, 102437)]