19938765

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{283}}^1$

素因数の和:370

約数の個数: 64

約数和(自身を含む): 40568832

約数和(自身を除く): 20630067

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 61, 77, 105, 165, 183, 231, 283, 305, 385, 427, 671, 849, 915, 1155, 1281, 1415, 1981, 2013, 2135, 3113, 3355, 4245, 4697, 5943, 6405, 9339, 9905, 10065, 14091, 15565, 17263, 21791, 23485, 29715, 46695, 51789, 65373, 70455, 86315, 108955, 120841, 189893, 258945, 326865, 362523, 569679, 604205, 949465, 1329251, 1812615, 2848395, 3987753, 6646255, 19938765]

約数ペア:

[(1, 19938765), (3, 6646255), (5, 3987753), (7, 2848395), (11, 1812615), (15, 1329251), (21, 949465), (33, 604205), (35, 569679), (55, 362523), (61, 326865), (77, 258945), (105, 189893), (165, 120841), (183, 108955), (231, 86315), (283, 70455), (305, 65373), (385, 51789), (427, 46695), (671, 29715), (849, 23485), (915, 21791), (1155, 17263), (1281, 15565), (1415, 14091), (1981, 10065), (2013, 9905), (2135, 9339), (3113, 6405), (3355, 5943), (4245, 4697)]