18394840

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4219}}^1$

素因数の和:4339

約数の個数: 32

約数和(自身を含む): 41778000

約数和(自身を除く): 23383160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4219, 4360, 8438, 16876, 21095, 33752, 42190, 84380, 168760, 459871, 919742, 1839484, 2299355, 3678968, 4598710, 9197420, 18394840]

約数ペア:

[(1, 18394840), (2, 9197420), (4, 4598710), (5, 3678968), (8, 2299355), (10, 1839484), (20, 919742), (40, 459871), (109, 168760), (218, 84380), (436, 42190), (545, 33752), (872, 21095), (1090, 16876), (2180, 8438), (4219, 4360)]