20387890

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{88643}}^1$

素因数の和:88673

約数の個数: 16

約数和(自身を含む): 38294208

約数和(自身を除く): 17906318

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 88643, 177286, 443215, 886430, 2038789, 4077578, 10193945, 20387890]

約数ペア:

[(1, 20387890), (2, 10193945), (5, 4077578), (10, 2038789), (23, 886430), (46, 443215), (115, 177286), (230, 88643)]