256291880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{1223}}^1$

素因数の和:1291

約数の個数: 96

約数和(自身を含む): 645096960

約数和(自身を除く): 388805080

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 169, 248, 260, 310, 338, 403, 520, 620, 676, 806, 845, 1223, 1240, 1352, 1612, 1690, 2015, 2446, 3224, 3380, 4030, 4892, 5239, 6115, 6760, 8060, 9784, 10478, 12230, 15899, 16120, 20956, 24460, 26195, 31798, 37913, 41912, 48920, 52390, 63596, 75826, 79495, 104780, 127192, 151652, 158990, 189565, 206687, 209560, 303304, 317980, 379130, 413374, 492869, 635960, 758260, 826748, 985738, 1033435, 1516520, 1653496, 1971476, 2066870, 2464345, 3942952, 4133740, 4928690, 6407297, 8267480, 9857380, 12814594, 19714760, 25629188, 32036485, 51258376, 64072970, 128145940, 256291880]

約数ペア:

[(1, 256291880), (2, 128145940), (4, 64072970), (5, 51258376), (8, 32036485), (10, 25629188), (13, 19714760), (20, 12814594), (26, 9857380), (31, 8267480), (40, 6407297), (52, 4928690), (62, 4133740), (65, 3942952), (104, 2464345), (124, 2066870), (130, 1971476), (155, 1653496), (169, 1516520), (248, 1033435), (260, 985738), (310, 826748), (338, 758260), (403, 635960), (520, 492869), (620, 413374), (676, 379130), (806, 317980), (845, 303304), (1223, 209560), (1240, 206687), (1352, 189565), (1612, 158990), (1690, 151652), (2015, 127192), (2446, 104780), (3224, 79495), (3380, 75826), (4030, 63596), (4892, 52390), (5239, 48920), (6115, 41912), (6760, 37913), (8060, 31798), (9784, 26195), (10478, 24460), (12230, 20956), (15899, 16120)]