About the Number

1289280

1289279 ← → 1289281

2進数表記:100111010110001000000

漢数字表記:百二十八万九千二百八十

素因数分解:

2 6 × 3 1 × 5 1 × 17 1 × 79 1

素因数の和:116
約数の個数: 112
約数和(自身を含む): 4389120
約数和(自身を除く): 3099840

約数列:
[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 32, 34, 40, 48, 51, 60, 64, 68, 79, 80, 85, 96, 102, 120, 136, 158, 160, 170, 192, 204, 237, 240, 255, 272, 316, 320, 340, 395, 408, 474, 480, 510, 544, 632, 680, 790, 816, 948, 960, 1020, 1088, 1185, 1264, 1343, 1360, 1580, 1632, 1896, 2040, 2370, 2528, 2686, 2720, 3160, 3264, 3792, 4029, 4080, 4740, 5056, 5372, 5440, 6320, 6715, 7584, 8058, 8160, 9480, 10744, 12640, 13430, 15168, 16116, 16320, 18960, 20145, 21488, 25280, 26860, 32232, 37920, 40290, 42976, 53720, 64464, 75840, 80580, 85952, 107440, 128928, 161160, 214880, 257856, 322320, 429760, 644640, 1289280]

約数ペア:
[(1, 1289280), (2, 644640), (3, 429760), (4, 322320), (5, 257856), (6, 214880), (8, 161160), (10, 128928), (12, 107440), (15, 85952), (16, 80580), (17, 75840), (20, 64464), (24, 53720), (30, 42976), (32, 40290), (34, 37920), (40, 32232), (48, 26860), (51, 25280), (60, 21488), (64, 20145), (68, 18960), (79, 16320), (80, 16116), (85, 15168), (96, 13430), (102, 12640), (120, 10744), (136, 9480), (158, 8160), (160, 8058), (170, 7584), (192, 6715), (204, 6320), (237, 5440), (240, 5372), (255, 5056), (272, 4740), (316, 4080), (320, 4029), (340, 3792), (395, 3264), (408, 3160), (474, 2720), (480, 2686), (510, 2528), (544, 2370), (632, 2040), (680, 1896), (790, 1632), (816, 1580), (948, 1360), (960, 1343), (1020, 1264), (1088, 1185)]

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