81720940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{229}}^1\times {\mathrm{2549}}^1$

素因数の和:2794

約数の個数: 48

約数和(自身を含む): 197064000

約数和(自身を除く): 115343060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 229, 458, 916, 1145, 1603, 2290, 2549, 3206, 4580, 5098, 6412, 8015, 10196, 12745, 16030, 17843, 25490, 32060, 35686, 50980, 71372, 89215, 178430, 356860, 583721, 1167442, 2334884, 2918605, 4086047, 5837210, 8172094, 11674420, 16344188, 20430235, 40860470, 81720940]

約数ペア:

[(1, 81720940), (2, 40860470), (4, 20430235), (5, 16344188), (7, 11674420), (10, 8172094), (14, 5837210), (20, 4086047), (28, 2918605), (35, 2334884), (70, 1167442), (140, 583721), (229, 356860), (458, 178430), (916, 89215), (1145, 71372), (1603, 50980), (2290, 35686), (2549, 32060), (3206, 25490), (4580, 17843), (5098, 16030), (6412, 12745), (8015, 10196)]