20813455

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{887}}^1$

素因数の和:943

約数の個数: 24

約数和(自身を含む): 28419552

約数和(自身を除く): 7606097

約数列:

[1, 5, 13, 19, 65, 95, 247, 361, 887, 1235, 1805, 4435, 4693, 11531, 16853, 23465, 57655, 84265, 219089, 320207, 1095445, 1601035, 4162691, 20813455]

約数ペア:

[(1, 20813455), (5, 4162691), (13, 1601035), (19, 1095445), (65, 320207), (95, 219089), (247, 84265), (361, 57655), (887, 23465), (1235, 16853), (1805, 11531), (4435, 4693)]