21786280

素因数分解:

$2^3\times 5^1\times {\mathrm{151}}^1\times {\mathrm{3607}}^1$

素因数の和:3769

約数の個数: 32

約数和(自身を含む): 49357440

約数和(自身を除く): 27571160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 151, 302, 604, 755, 1208, 1510, 3020, 3607, 6040, 7214, 14428, 18035, 28856, 36070, 72140, 144280, 544657, 1089314, 2178628, 2723285, 4357256, 5446570, 10893140, 21786280]

約数ペア:

[(1, 21786280), (2, 10893140), (4, 5446570), (5, 4357256), (8, 2723285), (10, 2178628), (20, 1089314), (40, 544657), (151, 144280), (302, 72140), (604, 36070), (755, 28856), (1208, 18035), (1510, 14428), (3020, 7214), (3607, 6040)]