About the Number

21990843

21990842 ← → 21990844

2進数表記:1010011111000110110111011

漢数字表記:二千百九十九万八百四十三

素因数分解:

3 2 × 7 1 × 17 1 × 20533 1

素因数の和:20563
約数の個数: 24
約数和(自身を含む): 38439648
約数和(自身を除く): 16448805

約数列:
[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 20533, 61599, 143731, 184797, 349061, 431193, 1047183, 1293579, 2443427, 3141549, 7330281, 21990843]

約数ペア:
[(1, 21990843), (3, 7330281), (7, 3141549), (9, 2443427), (17, 1293579), (21, 1047183), (51, 431193), (63, 349061), (119, 184797), (153, 143731), (357, 61599), (1071, 20533)]

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