21000663477

素因数分解:

$3^3\times {\mathrm{947}}^1\times {\mathrm{821333}}^1$

素因数の和:822289

約数の個数: 16

約数和(自身を含む): 31144985280

約数和(自身を除く): 10144321803

約数列:

[1, 3, 9, 27, 947, 2841, 8523, 25569, 821333, 2463999, 7391997, 22175991, 777802351, 2333407053, 7000221159, 21000663477]

約数ペア:

[(1, 21000663477), (3, 7000221159), (9, 2333407053), (27, 777802351), (947, 22175991), (2841, 7391997), (8523, 2463999), (25569, 821333)]