21278110

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{449}}^1\times {\mathrm{677}}^1$

素因数の和:1140

約数の個数: 32

約数和(自身を含む): 43934400

約数和(自身を除く): 22656290

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 449, 677, 898, 1354, 2245, 3143, 3385, 4490, 4739, 6286, 6770, 9478, 15715, 23695, 31430, 47390, 303973, 607946, 1519865, 2127811, 3039730, 4255622, 10639055, 21278110]

約数ペア:

[(1, 21278110), (2, 10639055), (5, 4255622), (7, 3039730), (10, 2127811), (14, 1519865), (35, 607946), (70, 303973), (449, 47390), (677, 31430), (898, 23695), (1354, 15715), (2245, 9478), (3143, 6770), (3385, 6286), (4490, 4739)]