About the Number

31191380

31191379 ← → 31191381

2進数表記:1110110111111000101010100

漢数字表記:三千百十九万千三百八十

素因数分解:

2 2 × 5 1 × 11 2 × 12889 1

素因数の和:12920
約数の個数: 36
約数和(自身を含む): 72003540
約数和(自身を除く): 40812160

約数列:
[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 12889, 25778, 51556, 64445, 128890, 141779, 257780, 283558, 567116, 708895, 1417790, 1559569, 2835580, 3119138, 6238276, 7797845, 15595690, 31191380]

約数ペア:
[(1, 31191380), (2, 15595690), (4, 7797845), (5, 6238276), (10, 3119138), (11, 2835580), (20, 1559569), (22, 1417790), (44, 708895), (55, 567116), (110, 283558), (121, 257780), (220, 141779), (242, 128890), (484, 64445), (605, 51556), (1210, 25778), (2420, 12889)]

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