20317815

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{1217}}^1$

素因数の和:1288

約数の個数: 48

約数和(自身を含む): 41041728

約数和(自身を除く): 20723913

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 53, 63, 105, 159, 265, 315, 371, 477, 795, 1113, 1217, 1855, 2385, 3339, 3651, 5565, 6085, 8519, 10953, 16695, 18255, 25557, 42595, 54765, 64501, 76671, 127785, 193503, 322505, 383355, 451507, 580509, 967515, 1354521, 2257535, 2902545, 4063563, 6772605, 20317815]

約数ペア:

[(1, 20317815), (3, 6772605), (5, 4063563), (7, 2902545), (9, 2257535), (15, 1354521), (21, 967515), (35, 580509), (45, 451507), (53, 383355), (63, 322505), (105, 193503), (159, 127785), (265, 76671), (315, 64501), (371, 54765), (477, 42595), (795, 25557), (1113, 18255), (1217, 16695), (1855, 10953), (2385, 8519), (3339, 6085), (3651, 5565)]