20615900

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{181}}^1$

素因数の和:279

約数の個数: 72

約数和(自身を含む): 48340656

約数和(自身を除く): 27724756

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 67, 68, 85, 100, 134, 170, 181, 268, 335, 340, 362, 425, 670, 724, 850, 905, 1139, 1340, 1675, 1700, 1810, 2278, 3077, 3350, 3620, 4525, 4556, 5695, 6154, 6700, 9050, 11390, 12127, 12308, 15385, 18100, 22780, 24254, 28475, 30770, 48508, 56950, 60635, 61540, 76925, 113900, 121270, 153850, 206159, 242540, 303175, 307700, 412318, 606350, 824636, 1030795, 1212700, 2061590, 4123180, 5153975, 10307950, 20615900]

約数ペア:

[(1, 20615900), (2, 10307950), (4, 5153975), (5, 4123180), (10, 2061590), (17, 1212700), (20, 1030795), (25, 824636), (34, 606350), (50, 412318), (67, 307700), (68, 303175), (85, 242540), (100, 206159), (134, 153850), (170, 121270), (181, 113900), (268, 76925), (335, 61540), (340, 60635), (362, 56950), (425, 48508), (670, 30770), (724, 28475), (850, 24254), (905, 22780), (1139, 18100), (1340, 15385), (1675, 12308), (1700, 12127), (1810, 11390), (2278, 9050), (3077, 6700), (3350, 6154), (3620, 5695), (4525, 4556)]