20721345

素因数分解:

$3^1\times 5^1\times {\mathrm{929}}^1\times {\mathrm{1487}}^1$

素因数の和:2424

約数の個数: 16

約数和(自身を含む): 33212160

約数和(自身を除く): 12490815

約数列:

[1, 3, 5, 15, 929, 1487, 2787, 4461, 4645, 7435, 13935, 22305, 1381423, 4144269, 6907115, 20721345]

約数ペア:

[(1, 20721345), (3, 6907115), (5, 4144269), (15, 1381423), (929, 22305), (1487, 13935), (2787, 7435), (4461, 4645)]