About the Number

198420990

198420989 ← → 198420991

2進数表記:1011110100111010100111111110

漢数字表記:一億九千八百四十二万九百九十

素因数分解:

2 1 × 3 1 × 5 1 × 19 1 × 127 1 × 2741 1

素因数の和:2897
約数の個数: 64
約数和(自身を含む): 505405440
約数和(自身を除く): 306984450

約数列:
[1, 2, 3, 5, 6, 10, 15, 19, 30, 38, 57, 95, 114, 127, 190, 254, 285, 381, 570, 635, 762, 1270, 1905, 2413, 2741, 3810, 4826, 5482, 7239, 8223, 12065, 13705, 14478, 16446, 24130, 27410, 36195, 41115, 52079, 72390, 82230, 104158, 156237, 260395, 312474, 348107, 520790, 696214, 781185, 1044321, 1562370, 1740535, 2088642, 3481070, 5221605, 6614033, 10443210, 13228066, 19842099, 33070165, 39684198, 66140330, 99210495, 198420990]

約数ペア:
[(1, 198420990), (2, 99210495), (3, 66140330), (5, 39684198), (6, 33070165), (10, 19842099), (15, 13228066), (19, 10443210), (30, 6614033), (38, 5221605), (57, 3481070), (95, 2088642), (114, 1740535), (127, 1562370), (190, 1044321), (254, 781185), (285, 696214), (381, 520790), (570, 348107), (635, 312474), (762, 260395), (1270, 156237), (1905, 104158), (2413, 82230), (2741, 72390), (3810, 52079), (4826, 41115), (5482, 36195), (7239, 27410), (8223, 24130), (12065, 16446), (13705, 14478)]

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