21000886205

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{1039}}^1\times {\mathrm{2087}}^1$

素因数の和:3293

約数の個数: 32

約数和(自身を含む): 27361152000

約数和(自身を除く): 6360265795

約数列:

[1, 5, 13, 65, 149, 745, 1039, 1937, 2087, 5195, 9685, 10435, 13507, 27131, 67535, 135655, 154811, 310963, 774055, 1554815, 2012543, 2168393, 4042519, 10062715, 10841965, 20212595, 28189109, 140945545, 323090557, 1615452785, 4200177241, 21000886205]

約数ペア:

[(1, 21000886205), (5, 4200177241), (13, 1615452785), (65, 323090557), (149, 140945545), (745, 28189109), (1039, 20212595), (1937, 10841965), (2087, 10062715), (5195, 4042519), (9685, 2168393), (10435, 2012543), (13507, 1554815), (27131, 774055), (67535, 310963), (135655, 154811)]