21987520

素因数分解:

$2^6\times 5^1\times {\mathrm{68711}}^1$

素因数の和:68728

約数の個数: 28

約数和(自身を含む): 52358544

約数和(自身を除く): 30371024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 68711, 137422, 274844, 343555, 549688, 687110, 1099376, 1374220, 2198752, 2748440, 4397504, 5496880, 10993760, 21987520]

約数ペア:

[(1, 21987520), (2, 10993760), (4, 5496880), (5, 4397504), (8, 2748440), (10, 2198752), (16, 1374220), (20, 1099376), (32, 687110), (40, 549688), (64, 343555), (80, 274844), (160, 137422), (320, 68711)]