20638840

素因数分解:

$2^3\times 5^1\times {\mathrm{227}}^1\times {\mathrm{2273}}^1$

素因数の和:2511

約数の個数: 32

約数和(自身を含む): 46662480

約数和(自身を除く): 26023640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 227, 454, 908, 1135, 1816, 2270, 2273, 4540, 4546, 9080, 9092, 11365, 18184, 22730, 45460, 90920, 515971, 1031942, 2063884, 2579855, 4127768, 5159710, 10319420, 20638840]

約数ペア:

[(1, 20638840), (2, 10319420), (4, 5159710), (5, 4127768), (8, 2579855), (10, 2063884), (20, 1031942), (40, 515971), (227, 90920), (454, 45460), (908, 22730), (1135, 18184), (1816, 11365), (2270, 9092), (2273, 9080), (4540, 4546)]