19979505

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1$

素因数の和:96

約数の個数: 144

約数和(自身を含む): 47056464

約数和(自身を除く): 27076959

約数列:

[1, 3, 5, 7, 9, 13, 15, 17, 21, 35, 39, 41, 45, 49, 51, 63, 65, 85, 91, 105, 117, 119, 123, 147, 153, 195, 205, 221, 245, 255, 273, 287, 315, 357, 369, 441, 455, 533, 585, 595, 615, 637, 663, 697, 735, 765, 819, 833, 861, 1071, 1105, 1365, 1435, 1547, 1599, 1785, 1845, 1911, 1989, 2009, 2091, 2205, 2499, 2583, 2665, 3185, 3315, 3485, 3731, 4095, 4165, 4305, 4641, 4797, 4879, 5355, 5733, 6027, 6273, 7497, 7735, 7995, 9061, 9555, 9945, 10045, 10455, 10829, 11193, 12495, 12915, 13923, 14637, 18081, 18655, 23205, 23985, 24395, 26117, 27183, 28665, 30135, 31365, 32487, 33579, 34153, 37485, 43911, 45305, 54145, 55965, 63427, 69615, 73185, 78351, 81549, 90405, 97461, 102459, 130585, 135915, 162435, 167895, 170765, 190281, 219555, 235053, 307377, 317135, 391755, 407745, 443989, 487305, 512295, 570843, 951405, 1175265, 1331967, 1536885, 2219945, 2854215, 3995901, 6659835, 19979505]

約数ペア:

[(1, 19979505), (3, 6659835), (5, 3995901), (7, 2854215), (9, 2219945), (13, 1536885), (15, 1331967), (17, 1175265), (21, 951405), (35, 570843), (39, 512295), (41, 487305), (45, 443989), (49, 407745), (51, 391755), (63, 317135), (65, 307377), (85, 235053), (91, 219555), (105, 190281), (117, 170765), (119, 167895), (123, 162435), (147, 135915), (153, 130585), (195, 102459), (205, 97461), (221, 90405), (245, 81549), (255, 78351), (273, 73185), (287, 69615), (315, 63427), (357, 55965), (369, 54145), (441, 45305), (455, 43911), (533, 37485), (585, 34153), (595, 33579), (615, 32487), (637, 31365), (663, 30135), (697, 28665), (735, 27183), (765, 26117), (819, 24395), (833, 23985), (861, 23205), (1071, 18655), (1105, 18081), (1365, 14637), (1435, 13923), (1547, 12915), (1599, 12495), (1785, 11193), (1845, 10829), (1911, 10455), (1989, 10045), (2009, 9945), (2091, 9555), (2205, 9061), (2499, 7995), (2583, 7735), (2665, 7497), (3185, 6273), (3315, 6027), (3485, 5733), (3731, 5355), (4095, 4879), (4165, 4797), (4305, 4641)]