21130544

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{30713}}^1$

素因数の和:30764

約数の個数: 20

約数和(自身を含む): 41893896

約数和(自身を除く): 20763352

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 30713, 61426, 122852, 245704, 491408, 1320659, 2641318, 5282636, 10565272, 21130544]

約数ペア:

[(1, 21130544), (2, 10565272), (4, 5282636), (8, 2641318), (16, 1320659), (43, 491408), (86, 245704), (172, 122852), (344, 61426), (688, 30713)]