21517797

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{397}}^1$

素因数の和:525

約数の個数: 32

約数和(自身を含む): 34387200

約数和(自身を除く): 12869403

約数列:

[1, 3, 7, 21, 29, 87, 89, 203, 267, 397, 609, 623, 1191, 1869, 2581, 2779, 7743, 8337, 11513, 18067, 34539, 35333, 54201, 80591, 105999, 241773, 247331, 741993, 1024657, 3073971, 7172599, 21517797]

約数ペア:

[(1, 21517797), (3, 7172599), (7, 3073971), (21, 1024657), (29, 741993), (87, 247331), (89, 241773), (203, 105999), (267, 80591), (397, 54201), (609, 35333), (623, 34539), (1191, 18067), (1869, 11513), (2581, 8337), (2779, 7743)]