21430971

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{157}}^1\times {\mathrm{523}}^1$

素因数の和:715

約数の個数: 24

約数和(自身を含む): 32288880

約数和(自身を除く): 10857909

約数列:

[1, 3, 9, 29, 87, 157, 261, 471, 523, 1413, 1569, 4553, 4707, 13659, 15167, 40977, 45501, 82111, 136503, 246333, 738999, 2381219, 7143657, 21430971]

約数ペア:

[(1, 21430971), (3, 7143657), (9, 2381219), (29, 738999), (87, 246333), (157, 136503), (261, 82111), (471, 45501), (523, 40977), (1413, 15167), (1569, 13659), (4553, 4707)]