About the Number

128212500

128212499 ← → 128212501

2進数表記:111101001000101111000010100

漢数字表記:一億二千八百二十一万二千五百

素因数分解:

2 2 × 3 1 × 5 5 × 13 1 × 263 1

素因数の和:308
約数の個数: 144
約数和(自身を含む): 404224128
約数和(自身を除く): 276011628

約数列:
[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 25, 26, 30, 39, 50, 52, 60, 65, 75, 78, 100, 125, 130, 150, 156, 195, 250, 260, 263, 300, 325, 375, 390, 500, 526, 625, 650, 750, 780, 789, 975, 1052, 1250, 1300, 1315, 1500, 1578, 1625, 1875, 1950, 2500, 2630, 3125, 3156, 3250, 3419, 3750, 3900, 3945, 4875, 5260, 6250, 6500, 6575, 6838, 7500, 7890, 8125, 9375, 9750, 10257, 12500, 13150, 13676, 15780, 16250, 17095, 18750, 19500, 19725, 20514, 24375, 26300, 32500, 32875, 34190, 37500, 39450, 40625, 41028, 48750, 51285, 65750, 68380, 78900, 81250, 85475, 97500, 98625, 102570, 121875, 131500, 162500, 164375, 170950, 197250, 205140, 243750, 256425, 328750, 341900, 394500, 427375, 487500, 493125, 512850, 657500, 821875, 854750, 986250, 1025700, 1282125, 1643750, 1709500, 1972500, 2136875, 2465625, 2564250, 3287500, 4273750, 4931250, 5128500, 6410625, 8547500, 9862500, 10684375, 12821250, 21368750, 25642500, 32053125, 42737500, 64106250, 128212500]

約数ペア:
[(1, 128212500), (2, 64106250), (3, 42737500), (4, 32053125), (5, 25642500), (6, 21368750), (10, 12821250), (12, 10684375), (13, 9862500), (15, 8547500), (20, 6410625), (25, 5128500), (26, 4931250), (30, 4273750), (39, 3287500), (50, 2564250), (52, 2465625), (60, 2136875), (65, 1972500), (75, 1709500), (78, 1643750), (100, 1282125), (125, 1025700), (130, 986250), (150, 854750), (156, 821875), (195, 657500), (250, 512850), (260, 493125), (263, 487500), (300, 427375), (325, 394500), (375, 341900), (390, 328750), (500, 256425), (526, 243750), (625, 205140), (650, 197250), (750, 170950), (780, 164375), (789, 162500), (975, 131500), (1052, 121875), (1250, 102570), (1300, 98625), (1315, 97500), (1500, 85475), (1578, 81250), (1625, 78900), (1875, 68380), (1950, 65750), (2500, 51285), (2630, 48750), (3125, 41028), (3156, 40625), (3250, 39450), (3419, 37500), (3750, 34190), (3900, 32875), (3945, 32500), (4875, 26300), (5260, 24375), (6250, 20514), (6500, 19725), (6575, 19500), (6838, 18750), (7500, 17095), (7890, 16250), (8125, 15780), (9375, 13676), (9750, 13150), (10257, 12500)]

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