21295180

素因数分解:

$2^2\times 5^1\times {\mathrm{271}}^1\times {\mathrm{3929}}^1$

素因数の和:4209

約数の個数: 24

約数和(自身を含む): 44896320

約数和(自身を除く): 23601140

約数列:

[1, 2, 4, 5, 10, 20, 271, 542, 1084, 1355, 2710, 3929, 5420, 7858, 15716, 19645, 39290, 78580, 1064759, 2129518, 4259036, 5323795, 10647590, 21295180]

約数ペア:

[(1, 21295180), (2, 10647590), (4, 5323795), (5, 4259036), (10, 2129518), (20, 1064759), (271, 78580), (542, 39290), (1084, 19645), (1355, 15716), (2710, 7858), (3929, 5420)]