18899865

素因数分解:

$3^3\times 5^1\times {\mathrm{139999}}^1$

素因数の和:140013

約数の個数: 16

約数和(自身を含む): 33600000

約数和(自身を除く): 14700135

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 139999, 419997, 699995, 1259991, 2099985, 3779973, 6299955, 18899865]

約数ペア:

[(1, 18899865), (3, 6299955), (5, 3779973), (9, 2099985), (15, 1259991), (27, 699995), (45, 419997), (135, 139999)]