21000357

素因数分解:

$3^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{4831}}^1$

素因数の和:4870

約数の個数: 32

約数和(自身を含む): 37109760

約数和(自身を除く): 16109403

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 161, 189, 207, 483, 621, 1449, 4347, 4831, 14493, 33817, 43479, 101451, 111113, 130437, 304353, 333339, 777791, 913059, 1000017, 2333373, 3000051, 7000119, 21000357]

約数ペア:

[(1, 21000357), (3, 7000119), (7, 3000051), (9, 2333373), (21, 1000017), (23, 913059), (27, 777791), (63, 333339), (69, 304353), (161, 130437), (189, 111113), (207, 101451), (483, 43479), (621, 33817), (1449, 14493), (4347, 4831)]