21881440

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{2791}}^1$

素因数の和:2820

約数の個数: 72

約数和(自身を含む): 60156432

約数和(自身を除く): 38274992

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 2791, 3920, 5582, 7840, 11164, 13955, 19537, 22328, 27910, 39074, 44656, 55820, 78148, 89312, 97685, 111640, 136759, 156296, 195370, 223280, 273518, 312592, 390740, 446560, 547036, 625184, 683795, 781480, 1094072, 1367590, 1562960, 2188144, 2735180, 3125920, 4376288, 5470360, 10940720, 21881440]

約数ペア:

[(1, 21881440), (2, 10940720), (4, 5470360), (5, 4376288), (7, 3125920), (8, 2735180), (10, 2188144), (14, 1562960), (16, 1367590), (20, 1094072), (28, 781480), (32, 683795), (35, 625184), (40, 547036), (49, 446560), (56, 390740), (70, 312592), (80, 273518), (98, 223280), (112, 195370), (140, 156296), (160, 136759), (196, 111640), (224, 97685), (245, 89312), (280, 78148), (392, 55820), (490, 44656), (560, 39074), (784, 27910), (980, 22328), (1120, 19537), (1568, 13955), (1960, 11164), (2791, 7840), (3920, 5582)]