20487740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11257}}^1$

素因数の和:11286

約数の個数: 48

約数和(自身を含む): 52957632

約数和(自身を除く): 32469892

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11257, 22514, 45028, 56285, 78799, 112570, 146341, 157598, 225140, 292682, 315196, 393995, 585364, 731705, 787990, 1024387, 1463410, 1575980, 2048774, 2926820, 4097548, 5121935, 10243870, 20487740]

約数ペア:

[(1, 20487740), (2, 10243870), (4, 5121935), (5, 4097548), (7, 2926820), (10, 2048774), (13, 1575980), (14, 1463410), (20, 1024387), (26, 787990), (28, 731705), (35, 585364), (52, 393995), (65, 315196), (70, 292682), (91, 225140), (130, 157598), (140, 146341), (182, 112570), (260, 78799), (364, 56285), (455, 45028), (910, 22514), (1820, 11257)]