201531855

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{127}}^2$

素因数の和:293

約数の個数: 72

約数和(自身を含む): 400312368

約数和(自身を除く): 198780513

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 49, 51, 85, 105, 119, 127, 147, 245, 255, 357, 381, 595, 635, 735, 833, 889, 1785, 1905, 2159, 2499, 2667, 4165, 4445, 6223, 6477, 10795, 12495, 13335, 15113, 16129, 18669, 31115, 32385, 45339, 48387, 75565, 80645, 93345, 105791, 112903, 226695, 241935, 274193, 317373, 338709, 528955, 564515, 790321, 822579, 1370965, 1586865, 1693545, 1919351, 2370963, 3951605, 4112895, 5758053, 9596755, 11854815, 13435457, 28790265, 40306371, 67177285, 201531855]

約数ペア:

[(1, 201531855), (3, 67177285), (5, 40306371), (7, 28790265), (15, 13435457), (17, 11854815), (21, 9596755), (35, 5758053), (49, 4112895), (51, 3951605), (85, 2370963), (105, 1919351), (119, 1693545), (127, 1586865), (147, 1370965), (245, 822579), (255, 790321), (357, 564515), (381, 528955), (595, 338709), (635, 317373), (735, 274193), (833, 241935), (889, 226695), (1785, 112903), (1905, 105791), (2159, 93345), (2499, 80645), (2667, 75565), (4165, 48387), (4445, 45339), (6223, 32385), (6477, 31115), (10795, 18669), (12495, 16129), (13335, 15113)]