21959763

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{1171}}^1$

素因数の和:1247

約数の個数: 32

約数和(自身を含む): 36003840

約数和(自身を除く): 14044077

約数列:

[1, 3, 7, 19, 21, 47, 57, 133, 141, 329, 399, 893, 987, 1171, 2679, 3513, 6251, 8197, 18753, 22249, 24591, 55037, 66747, 155743, 165111, 385259, 467229, 1045703, 1155777, 3137109, 7319921, 21959763]

約数ペア:

[(1, 21959763), (3, 7319921), (7, 3137109), (19, 1155777), (21, 1045703), (47, 467229), (57, 385259), (133, 165111), (141, 155743), (329, 66747), (399, 55037), (893, 24591), (987, 22249), (1171, 18753), (2679, 8197), (3513, 6251)]