638751568

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{1429}}^1$

素因数の和:1764

約数の個数: 80

約数和(自身を含む): 1529207680

約数和(自身を除く): 890456112

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 91, 104, 112, 182, 208, 307, 364, 614, 728, 1228, 1429, 1456, 2149, 2456, 2858, 3991, 4298, 4912, 5716, 7982, 8596, 10003, 11432, 15964, 17192, 18577, 20006, 22864, 27937, 31928, 34384, 37154, 40012, 55874, 63856, 74308, 80024, 111748, 130039, 148616, 160048, 223496, 260078, 297232, 438703, 446992, 520156, 877406, 1040312, 1754812, 2080624, 3070921, 3509624, 5703139, 6141842, 7019248, 11406278, 12283684, 22812556, 24567368, 39921973, 45625112, 49134736, 79843946, 91250224, 159687892, 319375784, 638751568]

約数ペア:

[(1, 638751568), (2, 319375784), (4, 159687892), (7, 91250224), (8, 79843946), (13, 49134736), (14, 45625112), (16, 39921973), (26, 24567368), (28, 22812556), (52, 12283684), (56, 11406278), (91, 7019248), (104, 6141842), (112, 5703139), (182, 3509624), (208, 3070921), (307, 2080624), (364, 1754812), (614, 1040312), (728, 877406), (1228, 520156), (1429, 446992), (1456, 438703), (2149, 297232), (2456, 260078), (2858, 223496), (3991, 160048), (4298, 148616), (4912, 130039), (5716, 111748), (7982, 80024), (8596, 74308), (10003, 63856), (11432, 55874), (15964, 40012), (17192, 37154), (18577, 34384), (20006, 31928), (22864, 27937)]