20741805

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{467}}^1$

素因数の和:535

約数の個数: 64

約数和(自身を含む): 43130880

約数和(自身を除く): 22389075

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 47, 63, 105, 135, 141, 189, 235, 315, 329, 423, 467, 705, 945, 987, 1269, 1401, 1645, 2115, 2335, 2961, 3269, 4203, 4935, 6345, 7005, 8883, 9807, 12609, 14805, 16345, 21015, 21949, 29421, 44415, 49035, 63045, 65847, 88263, 109745, 147105, 153643, 197541, 329235, 441315, 460929, 592623, 768215, 987705, 1382787, 2304645, 2963115, 4148361, 6913935, 20741805]

約数ペア:

[(1, 20741805), (3, 6913935), (5, 4148361), (7, 2963115), (9, 2304645), (15, 1382787), (21, 987705), (27, 768215), (35, 592623), (45, 460929), (47, 441315), (63, 329235), (105, 197541), (135, 153643), (141, 147105), (189, 109745), (235, 88263), (315, 65847), (329, 63045), (423, 49035), (467, 44415), (705, 29421), (945, 21949), (987, 21015), (1269, 16345), (1401, 14805), (1645, 12609), (2115, 9807), (2335, 8883), (2961, 7005), (3269, 6345), (4203, 4935)]