215621516

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{445499}}^1$

素因数の和:445525

約数の個数: 18

約数和(自身を含む): 414760500

約数和(自身を除く): 199138984

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 445499, 890998, 1781996, 4900489, 9800978, 19601956, 53905379, 107810758, 215621516]

約数ペア:

[(1, 215621516), (2, 107810758), (4, 53905379), (11, 19601956), (22, 9800978), (44, 4900489), (121, 1781996), (242, 890998), (484, 445499)]