21494781

素因数分解:

$3^3\times 7^3\times {\mathrm{11}}^1\times {\mathrm{211}}^1$

素因数の和:252

約数の個数: 64

約数和(自身を含む): 40704000

約数和(自身を除く): 19209219

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 49, 63, 77, 99, 147, 189, 211, 231, 297, 343, 441, 539, 633, 693, 1029, 1323, 1477, 1617, 1899, 2079, 2321, 3087, 3773, 4431, 4851, 5697, 6963, 9261, 10339, 11319, 13293, 14553, 16247, 20889, 31017, 33957, 39879, 48741, 62667, 72373, 93051, 101871, 113729, 146223, 217119, 279153, 341187, 438669, 651357, 796103, 1023561, 1954071, 2388309, 3070683, 7164927, 21494781]

約数ペア:

[(1, 21494781), (3, 7164927), (7, 3070683), (9, 2388309), (11, 1954071), (21, 1023561), (27, 796103), (33, 651357), (49, 438669), (63, 341187), (77, 279153), (99, 217119), (147, 146223), (189, 113729), (211, 101871), (231, 93051), (297, 72373), (343, 62667), (441, 48741), (539, 39879), (633, 33957), (693, 31017), (1029, 20889), (1323, 16247), (1477, 14553), (1617, 13293), (1899, 11319), (2079, 10339), (2321, 9261), (3087, 6963), (3773, 5697), (4431, 4851)]