81321400

素因数分解:

$2^3\times 5^2\times {\mathrm{281}}^1\times {\mathrm{1447}}^1$

素因数の和:1744

約数の個数: 48

約数和(自身を含む): 189876240

約数和(自身を除く): 108554840

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 281, 562, 1124, 1405, 1447, 2248, 2810, 2894, 5620, 5788, 7025, 7235, 11240, 11576, 14050, 14470, 28100, 28940, 36175, 56200, 57880, 72350, 144700, 289400, 406607, 813214, 1626428, 2033035, 3252856, 4066070, 8132140, 10165175, 16264280, 20330350, 40660700, 81321400]

約数ペア:

[(1, 81321400), (2, 40660700), (4, 20330350), (5, 16264280), (8, 10165175), (10, 8132140), (20, 4066070), (25, 3252856), (40, 2033035), (50, 1626428), (100, 813214), (200, 406607), (281, 289400), (562, 144700), (1124, 72350), (1405, 57880), (1447, 56200), (2248, 36175), (2810, 28940), (2894, 28100), (5620, 14470), (5788, 14050), (7025, 11576), (7235, 11240)]