About the Number

1991231421

1991231420 ← → 1991231422

2進数表記:1110110101011111100011110111101

漢数字表記:十九億九千百二十三万千四百二十一

素因数分解:

3 1 × 113 1 × 839 1 × 7001 1

素因数の和:7956
約数の個数: 16
約数和(自身を含む): 2682046080
約数和(自身を除く): 690814659

約数列:
[1, 3, 113, 339, 839, 2517, 7001, 21003, 94807, 284421, 791113, 2373339, 5873839, 17621517, 663743807, 1991231421]

約数ペア:
[(1, 1991231421), (3, 663743807), (113, 17621517), (339, 5873839), (839, 2373339), (2517, 791113), (7001, 284421), (21003, 94807)]

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