21424879

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:199

約数の個数: 32

約数和(自身を含む): 27371520

約数和(自身を除く): 5946641

約数列:

[1, 7, 17, 43, 53, 79, 119, 301, 371, 553, 731, 901, 1343, 2279, 3397, 4187, 5117, 6307, 9401, 15953, 23779, 29309, 38743, 57749, 71179, 180041, 271201, 404243, 498253, 1260287, 3060697, 21424879]

約数ペア:

[(1, 21424879), (7, 3060697), (17, 1260287), (43, 498253), (53, 404243), (79, 271201), (119, 180041), (301, 71179), (371, 57749), (553, 38743), (731, 29309), (901, 23779), (1343, 15953), (2279, 9401), (3397, 6307), (4187, 5117)]