21204291207

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{271}}^1\times {\mathrm{26641}}^1$

素因数の和:27015

約数の個数: 32

約数和(自身を含む): 31305415680

約数和(自身を除く): 10101124473

約数列:

[1, 3, 11, 33, 89, 267, 271, 813, 979, 2937, 2981, 8943, 24119, 26641, 72357, 79923, 265309, 293051, 795927, 879153, 2371049, 7113147, 7219711, 21659133, 26081539, 78244617, 79416821, 238250463, 642554279, 1927662837, 7068097069, 21204291207]

約数ペア:

[(1, 21204291207), (3, 7068097069), (11, 1927662837), (33, 642554279), (89, 238250463), (267, 79416821), (271, 78244617), (813, 26081539), (979, 21659133), (2937, 7219711), (2981, 7113147), (8943, 2371049), (24119, 879153), (26641, 795927), (72357, 293051), (79923, 265309)]