408020810

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{403981}}^1$

素因数の和:404089

約数の個数: 16

約数和(自身を含む): 741710952

約数和(自身を除く): 333690142

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 403981, 807962, 2019905, 4039810, 40802081, 81604162, 204010405, 408020810]

約数ペア:

[(1, 408020810), (2, 204010405), (5, 81604162), (10, 40802081), (101, 4039810), (202, 2019905), (505, 807962), (1010, 403981)]