2181025

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{103}}^1$

素因数の和:142

約数の個数: 36

約数和(自身を含む): 3430336

約数和(自身を除く): 1249311

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 103, 121, 175, 275, 385, 515, 605, 721, 847, 1133, 1925, 2575, 3025, 3605, 4235, 5665, 7931, 12463, 18025, 21175, 28325, 39655, 62315, 87241, 198275, 311575, 436205, 2181025]

約数ペア:

[(1, 2181025), (5, 436205), (7, 311575), (11, 198275), (25, 87241), (35, 62315), (55, 39655), (77, 28325), (103, 21175), (121, 18025), (175, 12463), (275, 7931), (385, 5665), (515, 4235), (605, 3605), (721, 3025), (847, 2575), (1133, 1925)]