21561617

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{367}}^1$

素因数の和:501

約数の個数: 24

約数和(自身を含む): 27688320

約数和(自身を除く): 6126703

約数列:

[1, 7, 11, 49, 77, 109, 367, 539, 763, 1199, 2569, 4037, 5341, 8393, 17983, 28259, 40003, 58751, 197813, 280021, 440033, 1960147, 3080231, 21561617]

約数ペア:

[(1, 21561617), (7, 3080231), (11, 1960147), (49, 440033), (77, 280021), (109, 197813), (367, 58751), (539, 40003), (763, 28259), (1199, 17983), (2569, 8393), (4037, 5341)]