21086758

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{631}}^1$

素因数の和:689

約数の個数: 48

約数和(自身を含む): 41499648

約数和(自身を除く): 20412890

約数列:

[1, 2, 7, 11, 14, 22, 31, 49, 62, 77, 98, 154, 217, 341, 434, 539, 631, 682, 1078, 1262, 1519, 2387, 3038, 4417, 4774, 6941, 8834, 13882, 16709, 19561, 30919, 33418, 39122, 48587, 61838, 97174, 136927, 215171, 273854, 340109, 430342, 680218, 958489, 1506197, 1916978, 3012394, 10543379, 21086758]

約数ペア:

[(1, 21086758), (2, 10543379), (7, 3012394), (11, 1916978), (14, 1506197), (22, 958489), (31, 680218), (49, 430342), (62, 340109), (77, 273854), (98, 215171), (154, 136927), (217, 97174), (341, 61838), (434, 48587), (539, 39122), (631, 33418), (682, 30919), (1078, 19561), (1262, 16709), (1519, 13882), (2387, 8834), (3038, 6941), (4417, 4774)]