20121885

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{199}}^1$

素因数の和:327

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 21350115

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 107, 135, 189, 199, 315, 321, 535, 597, 749, 945, 963, 995, 1393, 1605, 1791, 2247, 2889, 2985, 3745, 4179, 4815, 5373, 6741, 6965, 8955, 11235, 12537, 14445, 20223, 20895, 21293, 26865, 33705, 37611, 62685, 63879, 101115, 106465, 149051, 188055, 191637, 319395, 447153, 574911, 745255, 958185, 1341459, 2235765, 2874555, 4024377, 6707295, 20121885]

約数ペア:

[(1, 20121885), (3, 6707295), (5, 4024377), (7, 2874555), (9, 2235765), (15, 1341459), (21, 958185), (27, 745255), (35, 574911), (45, 447153), (63, 319395), (105, 191637), (107, 188055), (135, 149051), (189, 106465), (199, 101115), (315, 63879), (321, 62685), (535, 37611), (597, 33705), (749, 26865), (945, 21293), (963, 20895), (995, 20223), (1393, 14445), (1605, 12537), (1791, 11235), (2247, 8955), (2889, 6965), (2985, 6741), (3745, 5373), (4179, 4815)]