81816100

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{359}}^1$

素因数の和:469

約数の個数: 72

約数和(自身を含む): 185613120

約数和(自身を除く): 103797020

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 53, 86, 100, 106, 172, 212, 215, 265, 359, 430, 530, 718, 860, 1060, 1075, 1325, 1436, 1795, 2150, 2279, 2650, 3590, 4300, 4558, 5300, 7180, 8975, 9116, 11395, 15437, 17950, 19027, 22790, 30874, 35900, 38054, 45580, 56975, 61748, 76108, 77185, 95135, 113950, 154370, 190270, 227900, 308740, 380540, 385925, 475675, 771850, 818161, 951350, 1543700, 1636322, 1902700, 3272644, 4090805, 8181610, 16363220, 20454025, 40908050, 81816100]

約数ペア:

[(1, 81816100), (2, 40908050), (4, 20454025), (5, 16363220), (10, 8181610), (20, 4090805), (25, 3272644), (43, 1902700), (50, 1636322), (53, 1543700), (86, 951350), (100, 818161), (106, 771850), (172, 475675), (212, 385925), (215, 380540), (265, 308740), (359, 227900), (430, 190270), (530, 154370), (718, 113950), (860, 95135), (1060, 77185), (1075, 76108), (1325, 61748), (1436, 56975), (1795, 45580), (2150, 38054), (2279, 35900), (2650, 30874), (3590, 22790), (4300, 19027), (4558, 17950), (5300, 15437), (7180, 11395), (8975, 9116)]