About the Number

2808990

2808989 ← → 2808991

2進数表記:1010101101110010011110

漢数字表記:二百八十万八千九百九十

素因数分解:

2 1 × 3 2 × 5 1 × 23 2 × 59 1

素因数の和:118
約数の個数: 72
約数和(自身を含む): 7764120
約数和(自身を除く): 4955130

約数列:
[1, 2, 3, 5, 6, 9, 10, 15, 18, 23, 30, 45, 46, 59, 69, 90, 115, 118, 138, 177, 207, 230, 295, 345, 354, 414, 529, 531, 590, 690, 885, 1035, 1058, 1062, 1357, 1587, 1770, 2070, 2645, 2655, 2714, 3174, 4071, 4761, 5290, 5310, 6785, 7935, 8142, 9522, 12213, 13570, 15870, 20355, 23805, 24426, 31211, 40710, 47610, 61065, 62422, 93633, 122130, 156055, 187266, 280899, 312110, 468165, 561798, 936330, 1404495, 2808990]

約数ペア:
[(1, 2808990), (2, 1404495), (3, 936330), (5, 561798), (6, 468165), (9, 312110), (10, 280899), (15, 187266), (18, 156055), (23, 122130), (30, 93633), (45, 62422), (46, 61065), (59, 47610), (69, 40710), (90, 31211), (115, 24426), (118, 23805), (138, 20355), (177, 15870), (207, 13570), (230, 12213), (295, 9522), (345, 8142), (354, 7935), (414, 6785), (529, 5310), (531, 5290), (590, 4761), (690, 4071), (885, 3174), (1035, 2714), (1058, 2655), (1062, 2645), (1357, 2070), (1587, 1770)]

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