About the Number

388909990

388909989 ← → 388909991

2進数表記:10111001011100100101110100110

漢数字表記:三億八千八百九十万九千九百九十

素因数分解:

2 1 × 5 1 × 7 1 × 23 1 × 241559 1

素因数の和:241596
約数の個数: 32
約数和(自身を含む): 834831360
約数和(自身を除く): 445921370

約数列:
[1, 2, 5, 7, 10, 14, 23, 35, 46, 70, 115, 161, 230, 322, 805, 1610, 241559, 483118, 1207795, 1690913, 2415590, 3381826, 5555857, 8454565, 11111714, 16909130, 27779285, 38890999, 55558570, 77781998, 194454995, 388909990]

約数ペア:
[(1, 388909990), (2, 194454995), (5, 77781998), (7, 55558570), (10, 38890999), (14, 27779285), (23, 16909130), (35, 11111714), (46, 8454565), (70, 5555857), (115, 3381826), (161, 2415590), (230, 1690913), (322, 1207795), (805, 483118), (1610, 241559)]

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