20218695

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{241}}^1$

素因数の和:320

約数の個数: 64

約数和(自身を含む): 40144896

約数和(自身を除く): 19926201

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 47, 51, 85, 105, 119, 141, 235, 241, 255, 329, 357, 595, 705, 723, 799, 987, 1205, 1645, 1687, 1785, 2397, 3615, 3995, 4097, 4935, 5061, 5593, 8435, 11327, 11985, 12291, 16779, 20485, 25305, 27965, 28679, 33981, 56635, 61455, 79289, 83895, 86037, 143395, 169905, 192559, 237867, 396445, 430185, 577677, 962795, 1189335, 1347913, 2888385, 4043739, 6739565, 20218695]

約数ペア:

[(1, 20218695), (3, 6739565), (5, 4043739), (7, 2888385), (15, 1347913), (17, 1189335), (21, 962795), (35, 577677), (47, 430185), (51, 396445), (85, 237867), (105, 192559), (119, 169905), (141, 143395), (235, 86037), (241, 83895), (255, 79289), (329, 61455), (357, 56635), (595, 33981), (705, 28679), (723, 27965), (799, 25305), (987, 20485), (1205, 16779), (1645, 12291), (1687, 11985), (1785, 11327), (2397, 8435), (3615, 5593), (3995, 5061), (4097, 4935)]