21042345

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{179}}^1\times {\mathrm{461}}^1$

素因数の和:665

約数の個数: 32

約数和(自身を含む): 35925120

約数和(自身を除く): 14882775

約数列:

[1, 3, 5, 15, 17, 51, 85, 179, 255, 461, 537, 895, 1383, 2305, 2685, 3043, 6915, 7837, 9129, 15215, 23511, 39185, 45645, 82519, 117555, 247557, 412595, 1237785, 1402823, 4208469, 7014115, 21042345]

約数ペア:

[(1, 21042345), (3, 7014115), (5, 4208469), (15, 1402823), (17, 1237785), (51, 412595), (85, 247557), (179, 117555), (255, 82519), (461, 45645), (537, 39185), (895, 23511), (1383, 15215), (2305, 9129), (2685, 7837), (3043, 6915)]