261950000

素因数分解:

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

素因数の和:90

約数の個数: 180

約数和(自身を含む): 709079616

約数和(自身を除く): 447129616

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 31, 40, 50, 52, 62, 65, 80, 100, 104, 124, 125, 130, 155, 169, 200, 208, 248, 250, 260, 310, 325, 338, 400, 403, 496, 500, 520, 620, 625, 650, 676, 775, 806, 845, 1000, 1040, 1240, 1250, 1300, 1352, 1550, 1612, 1625, 1690, 2000, 2015, 2480, 2500, 2600, 2704, 3100, 3125, 3224, 3250, 3380, 3875, 4030, 4225, 5000, 5200, 5239, 6200, 6250, 6448, 6500, 6760, 7750, 8060, 8125, 8450, 10000, 10075, 10478, 12400, 12500, 13000, 13520, 15500, 16120, 16250, 16900, 19375, 20150, 20956, 21125, 25000, 26000, 26195, 31000, 32240, 32500, 33800, 38750, 40300, 40625, 41912, 42250, 50000, 50375, 52390, 62000, 65000, 67600, 77500, 80600, 81250, 83824, 84500, 96875, 100750, 104780, 105625, 130000, 130975, 155000, 161200, 162500, 169000, 193750, 201500, 209560, 211250, 251875, 261950, 310000, 325000, 338000, 387500, 403000, 419120, 422500, 503750, 523900, 528125, 650000, 654875, 775000, 806000, 845000, 1007500, 1047800, 1056250, 1259375, 1309750, 1550000, 1690000, 2015000, 2095600, 2112500, 2518750, 2619500, 3274375, 4030000, 4225000, 5037500, 5239000, 6548750, 8450000, 10075000, 10478000, 13097500, 16371875, 20150000, 26195000, 32743750, 52390000, 65487500, 130975000, 261950000]

約数ペア:

[(1, 261950000), (2, 130975000), (4, 65487500), (5, 52390000), (8, 32743750), (10, 26195000), (13, 20150000), (16, 16371875), (20, 13097500), (25, 10478000), (26, 10075000), (31, 8450000), (40, 6548750), (50, 5239000), (52, 5037500), (62, 4225000), (65, 4030000), (80, 3274375), (100, 2619500), (104, 2518750), (124, 2112500), (125, 2095600), (130, 2015000), (155, 1690000), (169, 1550000), (200, 1309750), (208, 1259375), (248, 1056250), (250, 1047800), (260, 1007500), (310, 845000), (325, 806000), (338, 775000), (400, 654875), (403, 650000), (496, 528125), (500, 523900), (520, 503750), (620, 422500), (625, 419120), (650, 403000), (676, 387500), (775, 338000), (806, 325000), (845, 310000), (1000, 261950), (1040, 251875), (1240, 211250), (1250, 209560), (1300, 201500), (1352, 193750), (1550, 169000), (1612, 162500), (1625, 161200), (1690, 155000), (2000, 130975), (2015, 130000), (2480, 105625), (2500, 104780), (2600, 100750), (2704, 96875), (3100, 84500), (3125, 83824), (3224, 81250), (3250, 80600), (3380, 77500), (3875, 67600), (4030, 65000), (4225, 62000), (5000, 52390), (5200, 50375), (5239, 50000), (6200, 42250), (6250, 41912), (6448, 40625), (6500, 40300), (6760, 38750), (7750, 33800), (8060, 32500), (8125, 32240), (8450, 31000), (10000, 26195), (10075, 26000), (10478, 25000), (12400, 21125), (12500, 20956), (13000, 20150), (13520, 19375), (15500, 16900), (16120, 16250)]