21000398480

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{6104767}}^1$

素因数の和:6104823

約数の個数: 40

約数和(自身を含む): 49961421312

約数和(自身を除く): 28961022832

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 6104767, 12209534, 24419068, 30523835, 48838136, 61047670, 97676272, 122095340, 244190680, 262504981, 488381360, 525009962, 1050019924, 1312524905, 2100039848, 2625049810, 4200079696, 5250099620, 10500199240, 21000398480]

約数ペア:

[(1, 21000398480), (2, 10500199240), (4, 5250099620), (5, 4200079696), (8, 2625049810), (10, 2100039848), (16, 1312524905), (20, 1050019924), (40, 525009962), (43, 488381360), (80, 262504981), (86, 244190680), (172, 122095340), (215, 97676272), (344, 61047670), (430, 48838136), (688, 30523835), (860, 24419068), (1720, 12209534), (3440, 6104767)]