About the Number

381680820

381680819 ← → 381680821

2進数表記:10110101111111111110010110100

漢数字表記:三億八千百六十八万八百二十

素因数分解:

2 2 × 3 2 × 5 1 × 307 1 × 6907 1

素因数の和:7229
約数の個数: 72
約数和(自身を含む): 1161704544
約数和(自身を除く): 780023724

約数列:
[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 307, 614, 921, 1228, 1535, 1842, 2763, 3070, 3684, 4605, 5526, 6140, 6907, 9210, 11052, 13814, 13815, 18420, 20721, 27628, 27630, 34535, 41442, 55260, 62163, 69070, 82884, 103605, 124326, 138140, 207210, 248652, 310815, 414420, 621630, 1243260, 2120449, 4240898, 6361347, 8481796, 10602245, 12722694, 19084041, 21204490, 25445388, 31806735, 38168082, 42408980, 63613470, 76336164, 95420205, 127226940, 190840410, 381680820]

約数ペア:
[(1, 381680820), (2, 190840410), (3, 127226940), (4, 95420205), (5, 76336164), (6, 63613470), (9, 42408980), (10, 38168082), (12, 31806735), (15, 25445388), (18, 21204490), (20, 19084041), (30, 12722694), (36, 10602245), (45, 8481796), (60, 6361347), (90, 4240898), (180, 2120449), (307, 1243260), (614, 621630), (921, 414420), (1228, 310815), (1535, 248652), (1842, 207210), (2763, 138140), (3070, 124326), (3684, 103605), (4605, 82884), (5526, 69070), (6140, 62163), (6907, 55260), (9210, 41442), (11052, 34535), (13814, 27630), (13815, 27628), (18420, 20721)]

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