20798739

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:232

約数の個数: 48

約数和(自身を含む): 34594560

約数和(自身を除く): 13795821

約数列:

[1, 3, 9, 13, 23, 39, 59, 69, 117, 131, 177, 207, 299, 393, 531, 767, 897, 1179, 1357, 1703, 2301, 2691, 3013, 4071, 5109, 6903, 7729, 9039, 12213, 15327, 17641, 23187, 27117, 39169, 52923, 69561, 100477, 117507, 158769, 177767, 301431, 352521, 533301, 904293, 1599903, 2310971, 6932913, 20798739]

約数ペア:

[(1, 20798739), (3, 6932913), (9, 2310971), (13, 1599903), (23, 904293), (39, 533301), (59, 352521), (69, 301431), (117, 177767), (131, 158769), (177, 117507), (207, 100477), (299, 69561), (393, 52923), (531, 39169), (767, 27117), (897, 23187), (1179, 17641), (1357, 15327), (1703, 12213), (2301, 9039), (2691, 7729), (3013, 6903), (4071, 5109)]