1988900240

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{9551}}^1$

素因数の和:9720

約数の個数: 80

約数和(自身を含む): 4903614720

約数和(自身を除く): 2914714480

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 137, 152, 190, 274, 304, 380, 548, 685, 760, 1096, 1370, 1520, 2192, 2603, 2740, 5206, 5480, 9551, 10412, 10960, 13015, 19102, 20824, 26030, 38204, 41648, 47755, 52060, 76408, 95510, 104120, 152816, 181469, 191020, 208240, 362938, 382040, 725876, 764080, 907345, 1308487, 1451752, 1814690, 2616974, 2903504, 3629380, 5233948, 6542435, 7258760, 10467896, 13084870, 14517520, 20935792, 24861253, 26169740, 49722506, 52339480, 99445012, 104678960, 124306265, 198890024, 248612530, 397780048, 497225060, 994450120, 1988900240]

約数ペア:

[(1, 1988900240), (2, 994450120), (4, 497225060), (5, 397780048), (8, 248612530), (10, 198890024), (16, 124306265), (19, 104678960), (20, 99445012), (38, 52339480), (40, 49722506), (76, 26169740), (80, 24861253), (95, 20935792), (137, 14517520), (152, 13084870), (190, 10467896), (274, 7258760), (304, 6542435), (380, 5233948), (548, 3629380), (685, 2903504), (760, 2616974), (1096, 1814690), (1370, 1451752), (1520, 1308487), (2192, 907345), (2603, 764080), (2740, 725876), (5206, 382040), (5480, 362938), (9551, 208240), (10412, 191020), (10960, 181469), (13015, 152816), (19102, 104120), (20824, 95510), (26030, 76408), (38204, 52060), (41648, 47755)]