21616660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1171}}^1$

素因数の和:1264

約数の個数: 48

約数和(自身を含む): 49617792

約数和(自身を除く): 28001132

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 71, 130, 142, 260, 284, 355, 710, 923, 1171, 1420, 1846, 2342, 3692, 4615, 4684, 5855, 9230, 11710, 15223, 18460, 23420, 30446, 60892, 76115, 83141, 152230, 166282, 304460, 332564, 415705, 831410, 1080833, 1662820, 2161666, 4323332, 5404165, 10808330, 21616660]

約数ペア:

[(1, 21616660), (2, 10808330), (4, 5404165), (5, 4323332), (10, 2161666), (13, 1662820), (20, 1080833), (26, 831410), (52, 415705), (65, 332564), (71, 304460), (130, 166282), (142, 152230), (260, 83141), (284, 76115), (355, 60892), (710, 30446), (923, 23420), (1171, 18460), (1420, 15223), (1846, 11710), (2342, 9230), (3692, 5855), (4615, 4684)]