About the Number

12420555

12420554 ← → 12420556

2進数表記:101111011000010111001011

漢数字表記:千二百四十二万五百五十五

素因数分解:

3 1 × 5 1 × 7 1 × 29 1 × 4079 1

素因数の和:4123
約数の個数: 32
約数和(自身を含む): 23500800
約数和(自身を除く): 11080245

約数列:
[1, 3, 5, 7, 15, 21, 29, 35, 87, 105, 145, 203, 435, 609, 1015, 3045, 4079, 12237, 20395, 28553, 61185, 85659, 118291, 142765, 354873, 428295, 591455, 828037, 1774365, 2484111, 4140185, 12420555]

約数ペア:
[(1, 12420555), (3, 4140185), (5, 2484111), (7, 1774365), (15, 828037), (21, 591455), (29, 428295), (35, 354873), (87, 142765), (105, 118291), (145, 85659), (203, 61185), (435, 28553), (609, 20395), (1015, 12237), (3045, 4079)]

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