19877650

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{577}}^1$

素因数の和:655

約数の個数: 48

約数和(自身を含む): 40638024

約数和(自身を除く): 20760374

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 53, 65, 106, 130, 265, 325, 530, 577, 650, 689, 1154, 1325, 1378, 2650, 2885, 3445, 5770, 6890, 7501, 14425, 15002, 17225, 28850, 30581, 34450, 37505, 61162, 75010, 152905, 187525, 305810, 375050, 397553, 764525, 795106, 1529050, 1987765, 3975530, 9938825, 19877650]

約数ペア:

[(1, 19877650), (2, 9938825), (5, 3975530), (10, 1987765), (13, 1529050), (25, 795106), (26, 764525), (50, 397553), (53, 375050), (65, 305810), (106, 187525), (130, 152905), (265, 75010), (325, 61162), (530, 37505), (577, 34450), (650, 30581), (689, 28850), (1154, 17225), (1325, 15002), (1378, 14425), (2650, 7501), (2885, 6890), (3445, 5770)]