20380563

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{6883}}^1$

素因数の和:6943

約数の個数: 24

約数和(自身を含む): 34364928

約数和(自身を除く): 13984365

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961, 6883, 20649, 48181, 61947, 144543, 323501, 433629, 970503, 2264507, 2911509, 6793521, 20380563]

約数ペア:

[(1, 20380563), (3, 6793521), (7, 2911509), (9, 2264507), (21, 970503), (47, 433629), (63, 323501), (141, 144543), (329, 61947), (423, 48181), (987, 20649), (2961, 6883)]