21487970

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{43853}}^1$

素因数の和:43874

約数の個数: 24

約数和(自身を含む): 44994204

約数和(自身を除く): 23506234

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 43853, 87706, 219265, 306971, 438530, 613942, 1534855, 2148797, 3069710, 4297594, 10743985, 21487970]

約数ペア:

[(1, 21487970), (2, 10743985), (5, 4297594), (7, 3069710), (10, 2148797), (14, 1534855), (35, 613942), (49, 438530), (70, 306971), (98, 219265), (245, 87706), (490, 43853)]