21877390

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{20071}}^1$

素因数の和:20187

約数の個数: 16

約数和(自身を含む): 39742560

約数和(自身を除く): 17865170

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 20071, 40142, 100355, 200710, 2187739, 4375478, 10938695, 21877390]

約数ペア:

[(1, 21877390), (2, 10938695), (5, 4375478), (10, 2187739), (109, 200710), (218, 100355), (545, 40142), (1090, 20071)]