About the Number

128128890

128128889 ← → 128128891

2進数表記:111101000110001011101111010

漢数字表記:一億二千八百十二万八千八百九十

素因数分解:

2 1 × 3 1 × 5 1 × 31 1 × 311 1 × 443 1

素因数の和:795
約数の個数: 64
約数和(自身を含む): 319168512
約数和(自身を除く): 191039622

約数列:
[1, 2, 3, 5, 6, 10, 15, 30, 31, 62, 93, 155, 186, 310, 311, 443, 465, 622, 886, 930, 933, 1329, 1555, 1866, 2215, 2658, 3110, 4430, 4665, 6645, 9330, 9641, 13290, 13733, 19282, 27466, 28923, 41199, 48205, 57846, 68665, 82398, 96410, 137330, 137773, 144615, 205995, 275546, 289230, 411990, 413319, 688865, 826638, 1377730, 2066595, 4133190, 4270963, 8541926, 12812889, 21354815, 25625778, 42709630, 64064445, 128128890]

約数ペア:
[(1, 128128890), (2, 64064445), (3, 42709630), (5, 25625778), (6, 21354815), (10, 12812889), (15, 8541926), (30, 4270963), (31, 4133190), (62, 2066595), (93, 1377730), (155, 826638), (186, 688865), (310, 413319), (311, 411990), (443, 289230), (465, 275546), (622, 205995), (886, 144615), (930, 137773), (933, 137330), (1329, 96410), (1555, 82398), (1866, 68665), (2215, 57846), (2658, 48205), (3110, 41199), (4430, 28923), (4665, 27466), (6645, 19282), (9330, 13733), (9641, 13290)]

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