About the Number

21491225

21491224 ← → 21491226

2進数表記:1010001111110111000011001

漢数字表記:二千百四十九万千二百二十五

素因数分解:

5 2 × 7 1 × 227 1 × 541 1

素因数の和:785
約数の個数: 24
約数和(自身を含む): 30646848
約数和(自身を除く): 9155623

約数列:
[1, 5, 7, 25, 35, 175, 227, 541, 1135, 1589, 2705, 3787, 5675, 7945, 13525, 18935, 39725, 94675, 122807, 614035, 859649, 3070175, 4298245, 21491225]

約数ペア:
[(1, 21491225), (5, 4298245), (7, 3070175), (25, 859649), (35, 614035), (175, 122807), (227, 94675), (541, 39725), (1135, 18935), (1589, 13525), (2705, 7945), (3787, 5675)]

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