21213951

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{233}}^1$

素因数の和:367

約数の個数: 32

約数和(自身を含む): 32348160

約数和(自身を除く): 11134209

約数列:

[1, 3, 11, 31, 33, 89, 93, 233, 267, 341, 699, 979, 1023, 2563, 2759, 2937, 7223, 7689, 8277, 20737, 21669, 30349, 62211, 79453, 91047, 228107, 238359, 642847, 684321, 1928541, 7071317, 21213951]

約数ペア:

[(1, 21213951), (3, 7071317), (11, 1928541), (31, 684321), (33, 642847), (89, 238359), (93, 228107), (233, 91047), (267, 79453), (341, 62211), (699, 30349), (979, 21669), (1023, 20737), (2563, 8277), (2759, 7689), (2937, 7223)]