21385515

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61987}}^1$

素因数の和:62018

約数の個数: 16

約数和(自身を含む): 35705088

約数和(自身を除く): 14319573

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 61987, 185961, 309935, 929805, 1425701, 4277103, 7128505, 21385515]

約数ペア:

[(1, 21385515), (3, 7128505), (5, 4277103), (15, 1425701), (23, 929805), (69, 309935), (115, 185961), (345, 61987)]