21380072

素因数分解:

$2^3\times 7^2\times {\mathrm{54541}}^1$

素因数の和:54561

約数の個数: 24

約数和(自身を含む): 46633410

約数和(自身を除く): 25253338

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 392, 54541, 109082, 218164, 381787, 436328, 763574, 1527148, 2672509, 3054296, 5345018, 10690036, 21380072]

約数ペア:

[(1, 21380072), (2, 10690036), (4, 5345018), (7, 3054296), (8, 2672509), (14, 1527148), (28, 763574), (49, 436328), (56, 381787), (98, 218164), (196, 109082), (392, 54541)]