18786921

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{4139}}^1$

素因数の和:4248

約数の個数: 16

約数和(自身を含む): 26827200

約数和(自身を除く): 8040279

約数列:

[1, 3, 17, 51, 89, 267, 1513, 4139, 4539, 12417, 70363, 211089, 368371, 1105113, 6262307, 18786921]

約数ペア:

[(1, 18786921), (3, 6262307), (17, 1105113), (51, 368371), (89, 211089), (267, 70363), (1513, 12417), (4139, 4539)]