About the Number

131820

131819 ← → 131821

2進数表記:100000001011101100

漢数字表記:十三万千八百二十

素因数分解:

2 2 × 3 1 × 5 1 × 13 3

素因数の和:51
約数の個数: 48
約数和(自身を含む): 399840
約数和(自身を除く): 268020

約数列:
[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 169, 195, 260, 338, 390, 507, 676, 780, 845, 1014, 1690, 2028, 2197, 2535, 3380, 4394, 5070, 6591, 8788, 10140, 10985, 13182, 21970, 26364, 32955, 43940, 65910, 131820]

約数ペア:
[(1, 131820), (2, 65910), (3, 43940), (4, 32955), (5, 26364), (6, 21970), (10, 13182), (12, 10985), (13, 10140), (15, 8788), (20, 6591), (26, 5070), (30, 4394), (39, 3380), (52, 2535), (60, 2197), (65, 2028), (78, 1690), (130, 1014), (156, 845), (169, 780), (195, 676), (260, 507), (338, 390)]

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