80438800

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{499}}^1$

素因数の和:561

約数の個数: 120

約数和(自身を含む): 215264000

約数和(自身を除く): 134825200

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 31, 40, 50, 52, 62, 65, 80, 100, 104, 124, 130, 155, 200, 208, 248, 260, 310, 325, 400, 403, 496, 499, 520, 620, 650, 775, 806, 998, 1040, 1240, 1300, 1550, 1612, 1996, 2015, 2480, 2495, 2600, 3100, 3224, 3992, 4030, 4990, 5200, 6200, 6448, 6487, 7984, 8060, 9980, 10075, 12400, 12475, 12974, 15469, 16120, 19960, 20150, 24950, 25948, 30938, 32240, 32435, 39920, 40300, 49900, 51896, 61876, 64870, 77345, 80600, 99800, 103792, 123752, 129740, 154690, 161200, 162175, 199600, 201097, 247504, 259480, 309380, 324350, 386725, 402194, 518960, 618760, 648700, 773450, 804388, 1005485, 1237520, 1297400, 1546900, 1608776, 2010970, 2594800, 3093800, 3217552, 4021940, 5027425, 6187600, 8043880, 10054850, 16087760, 20109700, 40219400, 80438800]

約数ペア:

[(1, 80438800), (2, 40219400), (4, 20109700), (5, 16087760), (8, 10054850), (10, 8043880), (13, 6187600), (16, 5027425), (20, 4021940), (25, 3217552), (26, 3093800), (31, 2594800), (40, 2010970), (50, 1608776), (52, 1546900), (62, 1297400), (65, 1237520), (80, 1005485), (100, 804388), (104, 773450), (124, 648700), (130, 618760), (155, 518960), (200, 402194), (208, 386725), (248, 324350), (260, 309380), (310, 259480), (325, 247504), (400, 201097), (403, 199600), (496, 162175), (499, 161200), (520, 154690), (620, 129740), (650, 123752), (775, 103792), (806, 99800), (998, 80600), (1040, 77345), (1240, 64870), (1300, 61876), (1550, 51896), (1612, 49900), (1996, 40300), (2015, 39920), (2480, 32435), (2495, 32240), (2600, 30938), (3100, 25948), (3224, 24950), (3992, 20150), (4030, 19960), (4990, 16120), (5200, 15469), (6200, 12974), (6448, 12475), (6487, 12400), (7984, 10075), (8060, 9980)]