21045700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{16189}}^1$

素因数の和:16216

約数の個数: 36

約数和(自身を含む): 49185220

約数和(自身を除く): 28139520

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 16189, 32378, 64756, 80945, 161890, 210457, 323780, 404725, 420914, 809450, 841828, 1052285, 1618900, 2104570, 4209140, 5261425, 10522850, 21045700]

約数ペア:

[(1, 21045700), (2, 10522850), (4, 5261425), (5, 4209140), (10, 2104570), (13, 1618900), (20, 1052285), (25, 841828), (26, 809450), (50, 420914), (52, 404725), (65, 323780), (100, 210457), (130, 161890), (260, 80945), (325, 64756), (650, 32378), (1300, 16189)]