About the Number

1221128928

1221128927 ← → 1221128929

2進数表記:1001000110010001111001011100000

漢数字表記:十二億二千百十二万八千九百二十八

素因数分解:

2 5 × 3 2 × 197 1 × 21523 1

素因数の和:21736
約数の個数: 72
約数和(自身を含む): 3490374888
約数和(自身を除く): 2269245960

約数列:
[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 96, 144, 197, 288, 394, 591, 788, 1182, 1576, 1773, 2364, 3152, 3546, 4728, 6304, 7092, 9456, 14184, 18912, 21523, 28368, 43046, 56736, 64569, 86092, 129138, 172184, 193707, 258276, 344368, 387414, 516552, 688736, 774828, 1033104, 1549656, 2066208, 3099312, 4240031, 6198624, 8480062, 12720093, 16960124, 25440186, 33920248, 38160279, 50880372, 67840496, 76320558, 101760744, 135680992, 152641116, 203521488, 305282232, 407042976, 610564464, 1221128928]

約数ペア:
[(1, 1221128928), (2, 610564464), (3, 407042976), (4, 305282232), (6, 203521488), (8, 152641116), (9, 135680992), (12, 101760744), (16, 76320558), (18, 67840496), (24, 50880372), (32, 38160279), (36, 33920248), (48, 25440186), (72, 16960124), (96, 12720093), (144, 8480062), (197, 6198624), (288, 4240031), (394, 3099312), (591, 2066208), (788, 1549656), (1182, 1033104), (1576, 774828), (1773, 688736), (2364, 516552), (3152, 387414), (3546, 344368), (4728, 258276), (6304, 193707), (7092, 172184), (9456, 129138), (14184, 86092), (18912, 64569), (21523, 56736), (28368, 43046)]

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