About the Number

399040990

399040989 ← → 399040991

2進数表記:10111110010001110000111011110

漢数字表記:三億九千九百四万九百九十

素因数分解:

2 1 × 5 1 × 31 1 × 311 1 × 4139 1

素因数の和:4488
約数の個数: 32
約数和(自身を含む): 744007680
約数和(自身を除く): 344966690

約数列:
[1, 2, 5, 10, 31, 62, 155, 310, 311, 622, 1555, 3110, 4139, 8278, 9641, 19282, 20695, 41390, 48205, 96410, 128309, 256618, 641545, 1283090, 1287229, 2574458, 6436145, 12872290, 39904099, 79808198, 199520495, 399040990]

約数ペア:
[(1, 399040990), (2, 199520495), (5, 79808198), (10, 39904099), (31, 12872290), (62, 6436145), (155, 2574458), (310, 1287229), (311, 1283090), (622, 641545), (1555, 256618), (3110, 128309), (4139, 96410), (8278, 48205), (9641, 41390), (19282, 20695)]

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