21153615

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{6947}}^1$

素因数の和:6991

約数の個数: 32

約数和(自身を含む): 40020480

約数和(自身を除く): 18866865

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 87, 105, 145, 203, 435, 609, 1015, 3045, 6947, 20841, 34735, 48629, 104205, 145887, 201463, 243145, 604389, 729435, 1007315, 1410241, 3021945, 4230723, 7051205, 21153615]

約数ペア:

[(1, 21153615), (3, 7051205), (5, 4230723), (7, 3021945), (15, 1410241), (21, 1007315), (29, 729435), (35, 604389), (87, 243145), (105, 201463), (145, 145887), (203, 104205), (435, 48629), (609, 34735), (1015, 20841), (3045, 6947)]