21625785

素因数分解:

$3^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{349}}^1$

素因数の和:389

約数の個数: 56

約数和(自身を含む): 41315400

約数和(自身を除く): 19689615

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 81, 85, 135, 153, 243, 255, 349, 405, 459, 729, 765, 1047, 1215, 1377, 1745, 2295, 3141, 3645, 4131, 5235, 5933, 6885, 9423, 12393, 15705, 17799, 20655, 28269, 29665, 47115, 53397, 61965, 84807, 88995, 141345, 160191, 254421, 266985, 424035, 480573, 800955, 1272105, 1441719, 2402865, 4325157, 7208595, 21625785]

約数ペア:

[(1, 21625785), (3, 7208595), (5, 4325157), (9, 2402865), (15, 1441719), (17, 1272105), (27, 800955), (45, 480573), (51, 424035), (81, 266985), (85, 254421), (135, 160191), (153, 141345), (243, 88995), (255, 84807), (349, 61965), (405, 53397), (459, 47115), (729, 29665), (765, 28269), (1047, 20655), (1215, 17799), (1377, 15705), (1745, 12393), (2295, 9423), (3141, 6885), (3645, 5933), (4131, 5235)]