20784428

素因数分解:

$2^2\times 7^3\times {\mathrm{15149}}^1$

素因数の和:15174

約数の個数: 24

約数和(自身を含む): 42420000

約数和(自身を除く): 21635572

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 343, 686, 1372, 15149, 30298, 60596, 106043, 212086, 424172, 742301, 1484602, 2969204, 5196107, 10392214, 20784428]

約数ペア:

[(1, 20784428), (2, 10392214), (4, 5196107), (7, 2969204), (14, 1484602), (28, 742301), (49, 424172), (98, 212086), (196, 106043), (343, 60596), (686, 30298), (1372, 15149)]