21898317

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{773}}^1$

素因数の和:873

約数の個数: 32

約数和(自身を含む): 35665920

約数和(自身を除く): 13767603

約数列:

[1, 3, 7, 19, 21, 57, 71, 133, 213, 399, 497, 773, 1349, 1491, 2319, 4047, 5411, 9443, 14687, 16233, 28329, 44061, 54883, 102809, 164649, 308427, 384181, 1042777, 1152543, 3128331, 7299439, 21898317]

約数ペア:

[(1, 21898317), (3, 7299439), (7, 3128331), (19, 1152543), (21, 1042777), (57, 384181), (71, 308427), (133, 164649), (213, 102809), (399, 54883), (497, 44061), (773, 28329), (1349, 16233), (1491, 14687), (2319, 9443), (4047, 5411)]