21049480

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{9929}}^1$

素因数の和:9993

約数の個数: 32

約数和(自身を含む): 48259800

約数和(自身を除く): 27210320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 9929, 19858, 39716, 49645, 79432, 99290, 198580, 397160, 526237, 1052474, 2104948, 2631185, 4209896, 5262370, 10524740, 21049480]

約数ペア:

[(1, 21049480), (2, 10524740), (4, 5262370), (5, 4209896), (8, 2631185), (10, 2104948), (20, 1052474), (40, 526237), (53, 397160), (106, 198580), (212, 99290), (265, 79432), (424, 49645), (530, 39716), (1060, 19858), (2120, 9929)]