21388157997

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{457}}^1\times {\mathrm{8419}}^1$

素因数の和:9005

約数の個数: 32

約数和(自身を含む): 30542371200

約数和(自身を除く): 9154213203

約数列:

[1, 3, 17, 51, 109, 327, 457, 1371, 1853, 5559, 7769, 8419, 23307, 25257, 49813, 143123, 149439, 429369, 846821, 917671, 2540463, 2753013, 3847483, 11542449, 15600407, 46801221, 65407211, 196221633, 419375647, 1258126941, 7129385999, 21388157997]

約数ペア:

[(1, 21388157997), (3, 7129385999), (17, 1258126941), (51, 419375647), (109, 196221633), (327, 65407211), (457, 46801221), (1371, 15600407), (1853, 11542449), (5559, 3847483), (7769, 2753013), (8419, 2540463), (23307, 917671), (25257, 846821), (49813, 429369), (143123, 149439)]