21642705

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{541}}^1$

素因数の和:686

約数の個数: 48

約数和(自身を含む): 43290624

約数和(自身を除く): 21647919

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 127, 315, 381, 541, 635, 889, 1143, 1623, 1905, 2667, 2705, 3787, 4445, 4869, 5715, 8001, 8115, 11361, 13335, 18935, 24345, 34083, 40005, 56805, 68707, 170415, 206121, 343535, 480949, 618363, 1030605, 1442847, 2404745, 3091815, 4328541, 7214235, 21642705]

約数ペア:

[(1, 21642705), (3, 7214235), (5, 4328541), (7, 3091815), (9, 2404745), (15, 1442847), (21, 1030605), (35, 618363), (45, 480949), (63, 343535), (105, 206121), (127, 170415), (315, 68707), (381, 56805), (541, 40005), (635, 34083), (889, 24345), (1143, 18935), (1623, 13335), (1905, 11361), (2667, 8115), (2705, 8001), (3787, 5715), (4445, 4869)]