20757555

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:205

約数の個数: 96

約数和(自身を含む): 45811584

約数和(自身を除く): 25054029

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 35, 37, 39, 45, 63, 65, 91, 105, 111, 117, 137, 185, 195, 259, 273, 315, 333, 411, 455, 481, 555, 585, 685, 777, 819, 959, 1233, 1295, 1365, 1443, 1665, 1781, 2055, 2331, 2405, 2877, 3367, 3885, 4095, 4329, 4795, 5069, 5343, 6165, 7215, 8631, 8905, 10101, 11655, 12467, 14385, 15207, 16029, 16835, 21645, 25345, 26715, 30303, 35483, 37401, 43155, 45621, 50505, 62335, 65897, 76035, 80145, 106449, 112203, 151515, 177415, 187005, 197691, 228105, 319347, 329485, 461279, 532245, 561015, 593073, 988455, 1383837, 1596735, 2306395, 2965365, 4151511, 6919185, 20757555]

約数ペア:

[(1, 20757555), (3, 6919185), (5, 4151511), (7, 2965365), (9, 2306395), (13, 1596735), (15, 1383837), (21, 988455), (35, 593073), (37, 561015), (39, 532245), (45, 461279), (63, 329485), (65, 319347), (91, 228105), (105, 197691), (111, 187005), (117, 177415), (137, 151515), (185, 112203), (195, 106449), (259, 80145), (273, 76035), (315, 65897), (333, 62335), (411, 50505), (455, 45621), (481, 43155), (555, 37401), (585, 35483), (685, 30303), (777, 26715), (819, 25345), (959, 21645), (1233, 16835), (1295, 16029), (1365, 15207), (1443, 14385), (1665, 12467), (1781, 11655), (2055, 10101), (2331, 8905), (2405, 8631), (2877, 7215), (3367, 6165), (3885, 5343), (4095, 5069), (4329, 4795)]