21675440

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{6301}}^1$

素因数の和:6357

約数の個数: 40

約数和(自身を含む): 51575568

約数和(自身を除く): 29900128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 6301, 12602, 25204, 31505, 50408, 63010, 100816, 126020, 252040, 270943, 504080, 541886, 1083772, 1354715, 2167544, 2709430, 4335088, 5418860, 10837720, 21675440]

約数ペア:

[(1, 21675440), (2, 10837720), (4, 5418860), (5, 4335088), (8, 2709430), (10, 2167544), (16, 1354715), (20, 1083772), (40, 541886), (43, 504080), (80, 270943), (86, 252040), (172, 126020), (215, 100816), (344, 63010), (430, 50408), (688, 31505), (860, 25204), (1720, 12602), (3440, 6301)]