20938407

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{659}}^1$

素因数の和:775

約数の個数: 32

約数和(自身を含む): 34214400

約数和(自身を除く): 13275993

約数列:

[1, 3, 7, 17, 21, 51, 89, 119, 267, 357, 623, 659, 1513, 1869, 1977, 4539, 4613, 10591, 11203, 13839, 31773, 33609, 58651, 78421, 175953, 235263, 410557, 997067, 1231671, 2991201, 6979469, 20938407]

約数ペア:

[(1, 20938407), (3, 6979469), (7, 2991201), (17, 1231671), (21, 997067), (51, 410557), (89, 235263), (119, 175953), (267, 78421), (357, 58651), (623, 33609), (659, 31773), (1513, 13839), (1869, 11203), (1977, 10591), (4539, 4613)]