21978726

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{421}}^1$

素因数の和:557

約数の個数: 64

約数和(自身を含む): 55420416

約数和(自身を除く): 33441690

約数列:

[1, 2, 3, 6, 7, 11, 14, 21, 22, 33, 42, 66, 77, 113, 154, 226, 231, 339, 421, 462, 678, 791, 842, 1243, 1263, 1582, 2373, 2486, 2526, 2947, 3729, 4631, 4746, 5894, 7458, 8701, 8841, 9262, 13893, 17402, 17682, 26103, 27786, 32417, 47573, 52206, 64834, 95146, 97251, 142719, 194502, 285438, 333011, 523303, 666022, 999033, 1046606, 1569909, 1998066, 3139818, 3663121, 7326242, 10989363, 21978726]

約数ペア:

[(1, 21978726), (2, 10989363), (3, 7326242), (6, 3663121), (7, 3139818), (11, 1998066), (14, 1569909), (21, 1046606), (22, 999033), (33, 666022), (42, 523303), (66, 333011), (77, 285438), (113, 194502), (154, 142719), (226, 97251), (231, 95146), (339, 64834), (421, 52206), (462, 47573), (678, 32417), (791, 27786), (842, 26103), (1243, 17682), (1263, 17402), (1582, 13893), (2373, 9262), (2486, 8841), (2526, 8701), (2947, 7458), (3729, 5894), (4631, 4746)]