21086770160

素因数分解:

$2^4\times 5^1\times {\mathrm{271}}^1\times {\mathrm{972637}}^1$

素因数の和:972921

約数の個数: 40

約数和(自身を含む): 49207701696

約数和(自身を除く): 28120931536

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271, 542, 1084, 1355, 2168, 2710, 4336, 5420, 10840, 21680, 972637, 1945274, 3890548, 4863185, 7781096, 9726370, 15562192, 19452740, 38905480, 77810960, 263584627, 527169254, 1054338508, 1317923135, 2108677016, 2635846270, 4217354032, 5271692540, 10543385080, 21086770160]

約数ペア:

[(1, 21086770160), (2, 10543385080), (4, 5271692540), (5, 4217354032), (8, 2635846270), (10, 2108677016), (16, 1317923135), (20, 1054338508), (40, 527169254), (80, 263584627), (271, 77810960), (542, 38905480), (1084, 19452740), (1355, 15562192), (2168, 9726370), (2710, 7781096), (4336, 4863185), (5420, 3890548), (10840, 1945274), (21680, 972637)]