About the Number

128387490

128387489 ← → 128387491

2進数表記:111101001110000100110100010

漢数字表記:一億二千八百三十八万七千四百九十

素因数分解:

2 1 × 3 1 × 5 1 × 7 1 × 11 1 × 55579 1

素因数の和:55607
約数の個数: 64
約数和(自身を含む): 384168960
約数和(自身を除く): 255781470

約数列:
[1, 2, 3, 5, 6, 7, 10, 11, 14, 15, 21, 22, 30, 33, 35, 42, 55, 66, 70, 77, 105, 110, 154, 165, 210, 231, 330, 385, 462, 770, 1155, 2310, 55579, 111158, 166737, 277895, 333474, 389053, 555790, 611369, 778106, 833685, 1167159, 1222738, 1667370, 1834107, 1945265, 2334318, 3056845, 3668214, 3890530, 4279583, 5835795, 6113690, 8559166, 9170535, 11671590, 12838749, 18341070, 21397915, 25677498, 42795830, 64193745, 128387490]

約数ペア:
[(1, 128387490), (2, 64193745), (3, 42795830), (5, 25677498), (6, 21397915), (7, 18341070), (10, 12838749), (11, 11671590), (14, 9170535), (15, 8559166), (21, 6113690), (22, 5835795), (30, 4279583), (33, 3890530), (35, 3668214), (42, 3056845), (55, 2334318), (66, 1945265), (70, 1834107), (77, 1667370), (105, 1222738), (110, 1167159), (154, 833685), (165, 778106), (210, 611369), (231, 555790), (330, 389053), (385, 333474), (462, 277895), (770, 166737), (1155, 111158), (2310, 55579)]

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