21159645

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{491}}^1$

素因数の和:542

約数の個数: 48

約数和(自身を含む): 38895552

約数和(自身を除く): 17735907

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 169, 195, 221, 255, 491, 507, 663, 845, 1105, 1473, 2455, 2535, 2873, 3315, 6383, 7365, 8347, 8619, 14365, 19149, 25041, 31915, 41735, 43095, 82979, 95745, 108511, 125205, 248937, 325533, 414895, 542555, 1244685, 1410643, 1627665, 4231929, 7053215, 21159645]

約数ペア:

[(1, 21159645), (3, 7053215), (5, 4231929), (13, 1627665), (15, 1410643), (17, 1244685), (39, 542555), (51, 414895), (65, 325533), (85, 248937), (169, 125205), (195, 108511), (221, 95745), (255, 82979), (491, 43095), (507, 41735), (663, 31915), (845, 25041), (1105, 19149), (1473, 14365), (2455, 8619), (2535, 8347), (2873, 7365), (3315, 6383)]