21999985

素因数分解:

$5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{15331}}^1$

素因数の和:15384

約数の個数: 16

約数和(自身を含む): 30909312

約数和(自身を除く): 8909327

約数列:

[1, 5, 7, 35, 41, 205, 287, 1435, 15331, 76655, 107317, 536585, 628571, 3142855, 4399997, 21999985]

約数ペア:

[(1, 21999985), (5, 4399997), (7, 3142855), (35, 628571), (41, 536585), (205, 107317), (287, 76655), (1435, 15331)]