21438615

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{7643}}^1$

素因数の和:7679

約数の個数: 32

約数和(自身を含む): 39626496

約数和(自身を除く): 18187881

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 85, 165, 187, 255, 561, 935, 2805, 7643, 22929, 38215, 84073, 114645, 129931, 252219, 389793, 420365, 649655, 1261095, 1429241, 1948965, 4287723, 7146205, 21438615]

約数ペア:

[(1, 21438615), (3, 7146205), (5, 4287723), (11, 1948965), (15, 1429241), (17, 1261095), (33, 649655), (51, 420365), (55, 389793), (85, 252219), (165, 129931), (187, 114645), (255, 84073), (561, 38215), (935, 22929), (2805, 7643)]