About the Number

1388685840

1388685839 ← → 1388685841

2進数表記:1010010110001011010101000010000

漢数字表記:十三億八千八百六十八万五千八百四十

素因数分解:

2 4 × 3 1 × 5 1 × 1039 1 × 5569 1

素因数の和:6624
約数の個数: 80
約数和(自身を含む): 4309843200
約数和(自身を除く): 2921157360

約数列:
[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 1039, 2078, 3117, 4156, 5195, 5569, 6234, 8312, 10390, 11138, 12468, 15585, 16624, 16707, 20780, 22276, 24936, 27845, 31170, 33414, 41560, 44552, 49872, 55690, 62340, 66828, 83120, 83535, 89104, 111380, 124680, 133656, 167070, 222760, 249360, 267312, 334140, 445520, 668280, 1336560, 5786191, 11572382, 17358573, 23144764, 28930955, 34717146, 46289528, 57861910, 69434292, 86792865, 92579056, 115723820, 138868584, 173585730, 231447640, 277737168, 347171460, 462895280, 694342920, 1388685840]

約数ペア:
[(1, 1388685840), (2, 694342920), (3, 462895280), (4, 347171460), (5, 277737168), (6, 231447640), (8, 173585730), (10, 138868584), (12, 115723820), (15, 92579056), (16, 86792865), (20, 69434292), (24, 57861910), (30, 46289528), (40, 34717146), (48, 28930955), (60, 23144764), (80, 17358573), (120, 11572382), (240, 5786191), (1039, 1336560), (2078, 668280), (3117, 445520), (4156, 334140), (5195, 267312), (5569, 249360), (6234, 222760), (8312, 167070), (10390, 133656), (11138, 124680), (12468, 111380), (15585, 89104), (16624, 83535), (16707, 83120), (20780, 66828), (22276, 62340), (24936, 55690), (27845, 49872), (31170, 44552), (33414, 41560)]

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