21085972

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{101}}^1$

素因数の和:232

約数の個数: 48

約数和(自身を含む): 40783680

約数和(自身を除く): 19697708

約数列:

[1, 2, 4, 19, 38, 41, 67, 76, 82, 101, 134, 164, 202, 268, 404, 779, 1273, 1558, 1919, 2546, 2747, 3116, 3838, 4141, 5092, 5494, 6767, 7676, 8282, 10988, 13534, 16564, 27068, 52193, 78679, 104386, 128573, 157358, 208772, 257146, 277447, 314716, 514292, 554894, 1109788, 5271493, 10542986, 21085972]

約数ペア:

[(1, 21085972), (2, 10542986), (4, 5271493), (19, 1109788), (38, 554894), (41, 514292), (67, 314716), (76, 277447), (82, 257146), (101, 208772), (134, 157358), (164, 128573), (202, 104386), (268, 78679), (404, 52193), (779, 27068), (1273, 16564), (1558, 13534), (1919, 10988), (2546, 8282), (2747, 7676), (3116, 6767), (3838, 5494), (4141, 5092)]