21688101

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{631}}^1$

素因数の和:726

約数の個数: 32

約数和(自身を含む): 34380800

約数和(自身を除く): 12692699

約数列:

[1, 3, 9, 19, 27, 57, 67, 171, 201, 513, 603, 631, 1273, 1809, 1893, 3819, 5679, 11457, 11989, 17037, 34371, 35967, 42277, 107901, 126831, 323703, 380493, 803263, 1141479, 2409789, 7229367, 21688101]

約数ペア:

[(1, 21688101), (3, 7229367), (9, 2409789), (19, 1141479), (27, 803263), (57, 380493), (67, 323703), (171, 126831), (201, 107901), (513, 42277), (603, 35967), (631, 34371), (1273, 17037), (1809, 11989), (1893, 11457), (3819, 5679)]