20729000

素因数分解:

$2^3\times 5^3\times {\mathrm{19}}^1\times {\mathrm{1091}}^1$

素因数の和:1131

約数の個数: 64

約数和(自身を含む): 51105600

約数和(自身を除く): 30376600

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 95, 100, 125, 152, 190, 200, 250, 380, 475, 500, 760, 950, 1000, 1091, 1900, 2182, 2375, 3800, 4364, 4750, 5455, 8728, 9500, 10910, 19000, 20729, 21820, 27275, 41458, 43640, 54550, 82916, 103645, 109100, 136375, 165832, 207290, 218200, 272750, 414580, 518225, 545500, 829160, 1036450, 1091000, 2072900, 2591125, 4145800, 5182250, 10364500, 20729000]

約数ペア:

[(1, 20729000), (2, 10364500), (4, 5182250), (5, 4145800), (8, 2591125), (10, 2072900), (19, 1091000), (20, 1036450), (25, 829160), (38, 545500), (40, 518225), (50, 414580), (76, 272750), (95, 218200), (100, 207290), (125, 165832), (152, 136375), (190, 109100), (200, 103645), (250, 82916), (380, 54550), (475, 43640), (500, 41458), (760, 27275), (950, 21820), (1000, 20729), (1091, 19000), (1900, 10910), (2182, 9500), (2375, 8728), (3800, 5455), (4364, 4750)]