About the Number

209420991

209420990 ← → 209420992

2進数表記:1100011110111000001010111111

漢数字表記:二億九百四十二万九百九十一

素因数分解:

3 3 × 13 1 × 61 1 × 9781 1

素因数の和:9864
約数の個数: 32
約数和(自身を含む): 339631040
約数和(自身を除く): 130210049

約数列:
[1, 3, 9, 13, 27, 39, 61, 117, 183, 351, 549, 793, 1647, 2379, 7137, 9781, 21411, 29343, 88029, 127153, 264087, 381459, 596641, 1144377, 1789923, 3433131, 5369769, 7756333, 16109307, 23268999, 69806997, 209420991]

約数ペア:
[(1, 209420991), (3, 69806997), (9, 23268999), (13, 16109307), (27, 7756333), (39, 5369769), (61, 3433131), (117, 1789923), (183, 1144377), (351, 596641), (549, 381459), (793, 264087), (1647, 127153), (2379, 88029), (7137, 29343), (9781, 21411)]

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