21335272

素因数分解:

$2^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{307}}^1$

素因数の和:410

約数の個数: 64

約数和(自身を含む): 49230720

約数和(自身を除く): 27895448

約数列:

[1, 2, 4, 7, 8, 14, 17, 28, 34, 56, 68, 73, 119, 136, 146, 238, 292, 307, 476, 511, 584, 614, 952, 1022, 1228, 1241, 2044, 2149, 2456, 2482, 4088, 4298, 4964, 5219, 8596, 8687, 9928, 10438, 17192, 17374, 20876, 22411, 34748, 36533, 41752, 44822, 69496, 73066, 89644, 146132, 156877, 179288, 292264, 313754, 380987, 627508, 761974, 1255016, 1523948, 2666909, 3047896, 5333818, 10667636, 21335272]

約数ペア:

[(1, 21335272), (2, 10667636), (4, 5333818), (7, 3047896), (8, 2666909), (14, 1523948), (17, 1255016), (28, 761974), (34, 627508), (56, 380987), (68, 313754), (73, 292264), (119, 179288), (136, 156877), (146, 146132), (238, 89644), (292, 73066), (307, 69496), (476, 44822), (511, 41752), (584, 36533), (614, 34748), (952, 22411), (1022, 20876), (1228, 17374), (1241, 17192), (2044, 10438), (2149, 9928), (2456, 8687), (2482, 8596), (4088, 5219), (4298, 4964)]