21078204

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{349}}^1\times {\mathrm{719}}^1$

素因数の和:1082

約数の個数: 48

約数和(自身を含む): 56448000

約数和(自身を除く): 35369796

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 349, 698, 719, 1047, 1396, 1438, 2094, 2157, 2443, 2876, 4188, 4314, 4886, 5033, 7329, 8628, 9772, 10066, 14658, 15099, 20132, 29316, 30198, 60396, 250931, 501862, 752793, 1003724, 1505586, 1756517, 3011172, 3513034, 5269551, 7026068, 10539102, 21078204]

約数ペア:

[(1, 21078204), (2, 10539102), (3, 7026068), (4, 5269551), (6, 3513034), (7, 3011172), (12, 1756517), (14, 1505586), (21, 1003724), (28, 752793), (42, 501862), (84, 250931), (349, 60396), (698, 30198), (719, 29316), (1047, 20132), (1396, 15099), (1438, 14658), (2094, 10066), (2157, 9772), (2443, 8628), (2876, 7329), (4188, 5033), (4314, 4886)]