21681918

素因数分解:

$2^1\times 3^7\times {\mathrm{4957}}^1$

素因数の和:4980

約数の個数: 32

約数和(自身を含む): 48786720

約数和(自身を除く): 27104802

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 81, 162, 243, 486, 729, 1458, 2187, 4374, 4957, 9914, 14871, 29742, 44613, 89226, 133839, 267678, 401517, 803034, 1204551, 2409102, 3613653, 7227306, 10840959, 21681918]

約数ペア:

[(1, 21681918), (2, 10840959), (3, 7227306), (6, 3613653), (9, 2409102), (18, 1204551), (27, 803034), (54, 401517), (81, 267678), (162, 133839), (243, 89226), (486, 44613), (729, 29742), (1458, 14871), (2187, 9914), (4374, 4957)]