About the Number

128970720

128970719 ← → 128970721

2進数表記:111101011111110111111100000

漢数字表記:一億二千八百九十七万七百二十

素因数分解:

2 5 × 3 2 × 5 1 × 89563 1

素因数の和:89584
約数の個数: 72
約数和(自身を含む): 440117496
約数和(自身を除く): 311146776

約数列:
[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 80, 90, 96, 120, 144, 160, 180, 240, 288, 360, 480, 720, 1440, 89563, 179126, 268689, 358252, 447815, 537378, 716504, 806067, 895630, 1074756, 1343445, 1433008, 1612134, 1791260, 2149512, 2686890, 2866016, 3224268, 3582520, 4030335, 4299024, 5373780, 6448536, 7165040, 8060670, 8598048, 10747560, 12897072, 14330080, 16121340, 21495120, 25794144, 32242680, 42990240, 64485360, 128970720]

約数ペア:
[(1, 128970720), (2, 64485360), (3, 42990240), (4, 32242680), (5, 25794144), (6, 21495120), (8, 16121340), (9, 14330080), (10, 12897072), (12, 10747560), (15, 8598048), (16, 8060670), (18, 7165040), (20, 6448536), (24, 5373780), (30, 4299024), (32, 4030335), (36, 3582520), (40, 3224268), (45, 2866016), (48, 2686890), (60, 2149512), (72, 1791260), (80, 1612134), (90, 1433008), (96, 1343445), (120, 1074756), (144, 895630), (160, 806067), (180, 716504), (240, 537378), (288, 447815), (360, 358252), (480, 268689), (720, 179126), (1440, 89563)]

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