21516460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{153689}}^1$

素因数の和:153705

約数の個数: 24

約数和(自身を含む): 51639840

約数和(自身を除く): 30123380

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 153689, 307378, 614756, 768445, 1075823, 1536890, 2151646, 3073780, 4303292, 5379115, 10758230, 21516460]

約数ペア:

[(1, 21516460), (2, 10758230), (4, 5379115), (5, 4303292), (7, 3073780), (10, 2151646), (14, 1536890), (20, 1075823), (28, 768445), (35, 614756), (70, 307378), (140, 153689)]