About the Number

121890

121889 ← → 121891

2進数表記:11101110000100010

漢数字表記:十二万千八百九十

素因数分解:

2 1 × 3 1 × 5 1 × 17 1 × 239 1

素因数の和:266
約数の個数: 32
約数和(自身を含む): 311040
約数和(自身を除く): 189150

約数列:
[1, 2, 3, 5, 6, 10, 15, 17, 30, 34, 51, 85, 102, 170, 239, 255, 478, 510, 717, 1195, 1434, 2390, 3585, 4063, 7170, 8126, 12189, 20315, 24378, 40630, 60945, 121890]

約数ペア:
[(1, 121890), (2, 60945), (3, 40630), (5, 24378), (6, 20315), (10, 12189), (15, 8126), (17, 7170), (30, 4063), (34, 3585), (51, 2390), (85, 1434), (102, 1195), (170, 717), (239, 510), (255, 478)]

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