21564788

素因数分解:

$2^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{9749}}^1$

素因数の和:9839

約数の個数: 24

約数和(自身を含む): 43680000

約数和(自身を除く): 22115212

約数列:

[1, 2, 4, 7, 14, 28, 79, 158, 316, 553, 1106, 2212, 9749, 19498, 38996, 68243, 136486, 272972, 770171, 1540342, 3080684, 5391197, 10782394, 21564788]

約数ペア:

[(1, 21564788), (2, 10782394), (4, 5391197), (7, 3080684), (14, 1540342), (28, 770171), (79, 272972), (158, 136486), (316, 68243), (553, 38996), (1106, 19498), (2212, 9749)]