About the Number

81468990

81468989 ← → 81468991

2進数表記:100110110110001111000111110

漢数字表記:八千百四十六万八千九百九十

素因数分解:

2 1 × 3 4 × 5 1 × 23 1 × 4373 1

素因数の和:4415
約数の個数: 80
約数和(自身を含む): 228637728
約数和(自身を除く): 147168738

約数列:
[1, 2, 3, 5, 6, 9, 10, 15, 18, 23, 27, 30, 45, 46, 54, 69, 81, 90, 115, 135, 138, 162, 207, 230, 270, 345, 405, 414, 621, 690, 810, 1035, 1242, 1863, 2070, 3105, 3726, 4373, 6210, 8746, 9315, 13119, 18630, 21865, 26238, 39357, 43730, 65595, 78714, 100579, 118071, 131190, 196785, 201158, 236142, 301737, 354213, 393570, 502895, 590355, 603474, 708426, 905211, 1005790, 1180710, 1508685, 1771065, 1810422, 2715633, 3017370, 3542130, 4526055, 5431266, 8146899, 9052110, 13578165, 16293798, 27156330, 40734495, 81468990]

約数ペア:
[(1, 81468990), (2, 40734495), (3, 27156330), (5, 16293798), (6, 13578165), (9, 9052110), (10, 8146899), (15, 5431266), (18, 4526055), (23, 3542130), (27, 3017370), (30, 2715633), (45, 1810422), (46, 1771065), (54, 1508685), (69, 1180710), (81, 1005790), (90, 905211), (115, 708426), (135, 603474), (138, 590355), (162, 502895), (207, 393570), (230, 354213), (270, 301737), (345, 236142), (405, 201158), (414, 196785), (621, 131190), (690, 118071), (810, 100579), (1035, 78714), (1242, 65595), (1863, 43730), (2070, 39357), (3105, 26238), (3726, 21865), (4373, 18630), (6210, 13119), (8746, 9315)]

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