21250107

素因数分解:

$3^5\times {\mathrm{157}}^1\times {\mathrm{557}}^1$

素因数の和:729

約数の個数: 24

約数和(自身を含む): 32091696

約数和(自身を除く): 10841589

約数列:

[1, 3, 9, 27, 81, 157, 243, 471, 557, 1413, 1671, 4239, 5013, 12717, 15039, 38151, 45117, 87449, 135351, 262347, 787041, 2361123, 7083369, 21250107]

約数ペア:

[(1, 21250107), (3, 7083369), (9, 2361123), (27, 787041), (81, 262347), (157, 135351), (243, 87449), (471, 45117), (557, 38151), (1413, 15039), (1671, 12717), (4239, 5013)]