20890443

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1277}}^1$

素因数の和:1347

約数の個数: 32

約数和(自身を含む): 34352640

約数和(自身を除く): 13462197

約数列:

[1, 3, 7, 19, 21, 41, 57, 123, 133, 287, 399, 779, 861, 1277, 2337, 3831, 5453, 8939, 16359, 24263, 26817, 52357, 72789, 157071, 169841, 366499, 509523, 994783, 1099497, 2984349, 6963481, 20890443]

約数ペア:

[(1, 20890443), (3, 6963481), (7, 2984349), (19, 1099497), (21, 994783), (41, 509523), (57, 366499), (123, 169841), (133, 157071), (287, 72789), (399, 52357), (779, 26817), (861, 24263), (1277, 16359), (2337, 8939), (3831, 5453)]