21887180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1231}}^1$

素因数の和:1374

約数の個数: 48

約数和(自身を含む): 52985856

約数和(自身を除く): 31098676

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 127, 140, 254, 508, 635, 889, 1231, 1270, 1778, 2462, 2540, 3556, 4445, 4924, 6155, 8617, 8890, 12310, 17234, 17780, 24620, 34468, 43085, 86170, 156337, 172340, 312674, 625348, 781685, 1094359, 1563370, 2188718, 3126740, 4377436, 5471795, 10943590, 21887180]

約数ペア:

[(1, 21887180), (2, 10943590), (4, 5471795), (5, 4377436), (7, 3126740), (10, 2188718), (14, 1563370), (20, 1094359), (28, 781685), (35, 625348), (70, 312674), (127, 172340), (140, 156337), (254, 86170), (508, 43085), (635, 34468), (889, 24620), (1231, 17780), (1270, 17234), (1778, 12310), (2462, 8890), (2540, 8617), (3556, 6155), (4445, 4924)]