21261645

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{27793}}^1$

素因数の和:27821

約数の個数: 24

約数和(自身を含む): 39022776

約数和(自身を除く): 17761131

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 27793, 83379, 138965, 250137, 416895, 472481, 1250685, 1417443, 2362405, 4252329, 7087215, 21261645]

約数ペア:

[(1, 21261645), (3, 7087215), (5, 4252329), (9, 2362405), (15, 1417443), (17, 1250685), (45, 472481), (51, 416895), (85, 250137), (153, 138965), (255, 83379), (765, 27793)]