21142090

素因数分解:

$2^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{16139}}^1$

素因数の和:16277

約数の個数: 16

約数和(自身を含む): 38348640

約数和(自身を除く): 17206550

約数列:

[1, 2, 5, 10, 131, 262, 655, 1310, 16139, 32278, 80695, 161390, 2114209, 4228418, 10571045, 21142090]

約数ペア:

[(1, 21142090), (2, 10571045), (5, 4228418), (10, 2114209), (131, 161390), (262, 80695), (655, 32278), (1310, 16139)]