20807409

素因数分解:

$3^1\times 7^3\times {\mathrm{73}}^1\times {\mathrm{277}}^1$

素因数の和:374

約数の個数: 32

約数和(自身を含む): 32915200

約数和(自身を除く): 12107791

約数列:

[1, 3, 7, 21, 49, 73, 147, 219, 277, 343, 511, 831, 1029, 1533, 1939, 3577, 5817, 10731, 13573, 20221, 25039, 40719, 60663, 75117, 95011, 141547, 285033, 424641, 990829, 2972487, 6935803, 20807409]

約数ペア:

[(1, 20807409), (3, 6935803), (7, 2972487), (21, 990829), (49, 424641), (73, 285033), (147, 141547), (219, 95011), (277, 75117), (343, 60663), (511, 40719), (831, 25039), (1029, 20221), (1533, 13573), (1939, 10731), (3577, 5817)]