20989969

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{1613}}^1$

素因数の和:1657

約数の個数: 24

約数和(自身を含む): 28354752

約数和(自身を除く): 7364783

約数列:

[1, 7, 11, 13, 77, 91, 143, 169, 1001, 1183, 1613, 1859, 11291, 13013, 17743, 20969, 124201, 146783, 230659, 272597, 1614613, 1908179, 2998567, 20989969]

約数ペア:

[(1, 20989969), (7, 2998567), (11, 1908179), (13, 1614613), (77, 272597), (91, 230659), (143, 146783), (169, 124201), (1001, 20969), (1183, 17743), (1613, 13013), (1859, 11291)]