21685690

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{1559}}^1$

素因数の和:1686

約数の個数: 32

約数和(自身を含む): 42456960

約数和(自身を除く): 20771270

約数列:

[1, 2, 5, 10, 13, 26, 65, 107, 130, 214, 535, 1070, 1391, 1559, 2782, 3118, 6955, 7795, 13910, 15590, 20267, 40534, 101335, 166813, 202670, 333626, 834065, 1668130, 2168569, 4337138, 10842845, 21685690]

約数ペア:

[(1, 21685690), (2, 10842845), (5, 4337138), (10, 2168569), (13, 1668130), (26, 834065), (65, 333626), (107, 202670), (130, 166813), (214, 101335), (535, 40534), (1070, 20267), (1391, 15590), (1559, 13910), (2782, 7795), (3118, 6955)]