19996515

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{199}}^1$

素因数の和:257

約数の個数: 96

約数和(自身を含む): 44928000

約数和(自身を除く): 24931485

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 29, 33, 35, 45, 55, 63, 77, 87, 99, 105, 145, 165, 199, 203, 231, 261, 315, 319, 385, 435, 495, 597, 609, 693, 957, 995, 1015, 1155, 1305, 1393, 1595, 1791, 1827, 2189, 2233, 2871, 2985, 3045, 3465, 4179, 4785, 5771, 6567, 6699, 6965, 8955, 9135, 10945, 11165, 12537, 14355, 15323, 17313, 19701, 20097, 20895, 28855, 32835, 33495, 40397, 45969, 51939, 62685, 63481, 76615, 86565, 98505, 100485, 121191, 137907, 190443, 201985, 229845, 259695, 317405, 363573, 444367, 571329, 605955, 689535, 952215, 1333101, 1817865, 2221835, 2856645, 3999303, 6665505, 19996515]

約数ペア:

[(1, 19996515), (3, 6665505), (5, 3999303), (7, 2856645), (9, 2221835), (11, 1817865), (15, 1333101), (21, 952215), (29, 689535), (33, 605955), (35, 571329), (45, 444367), (55, 363573), (63, 317405), (77, 259695), (87, 229845), (99, 201985), (105, 190443), (145, 137907), (165, 121191), (199, 100485), (203, 98505), (231, 86565), (261, 76615), (315, 63481), (319, 62685), (385, 51939), (435, 45969), (495, 40397), (597, 33495), (609, 32835), (693, 28855), (957, 20895), (995, 20097), (1015, 19701), (1155, 17313), (1305, 15323), (1393, 14355), (1595, 12537), (1791, 11165), (1827, 10945), (2189, 9135), (2233, 8955), (2871, 6965), (2985, 6699), (3045, 6567), (3465, 5771), (4179, 4785)]