20385688

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{73}}^1\times {\mathrm{521}}^1$

素因数の和:667

約数の個数: 32

約数和(自身を含む): 39400560

約数和(自身を除く): 19014872

約数列:

[1, 2, 4, 8, 67, 73, 134, 146, 268, 292, 521, 536, 584, 1042, 2084, 4168, 4891, 9782, 19564, 34907, 38033, 39128, 69814, 76066, 139628, 152132, 279256, 304264, 2548211, 5096422, 10192844, 20385688]

約数ペア:

[(1, 20385688), (2, 10192844), (4, 5096422), (8, 2548211), (67, 304264), (73, 279256), (134, 152132), (146, 139628), (268, 76066), (292, 69814), (521, 39128), (536, 38033), (584, 34907), (1042, 19564), (2084, 9782), (4168, 4891)]