19905963

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:212

約数の個数: 64

約数和(自身を含む): 36246528

約数和(自身を除く): 16340565

約数列:

[1, 3, 7, 11, 17, 21, 33, 37, 51, 77, 111, 119, 137, 187, 231, 259, 357, 407, 411, 561, 629, 777, 959, 1221, 1309, 1507, 1887, 2329, 2849, 2877, 3927, 4403, 4521, 5069, 6919, 6987, 8547, 10549, 13209, 15207, 16303, 20757, 25619, 31647, 35483, 48433, 48909, 55759, 76857, 86173, 106449, 145299, 167277, 179333, 258519, 390313, 537999, 603211, 947903, 1170939, 1809633, 2843709, 6635321, 19905963]

約数ペア:

[(1, 19905963), (3, 6635321), (7, 2843709), (11, 1809633), (17, 1170939), (21, 947903), (33, 603211), (37, 537999), (51, 390313), (77, 258519), (111, 179333), (119, 167277), (137, 145299), (187, 106449), (231, 86173), (259, 76857), (357, 55759), (407, 48909), (411, 48433), (561, 35483), (629, 31647), (777, 25619), (959, 20757), (1221, 16303), (1309, 15207), (1507, 13209), (1887, 10549), (2329, 8547), (2849, 6987), (2877, 6919), (3927, 5069), (4403, 4521)]