20504450

素因数分解:

$2^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{179}}^1$

素因数の和:299

約数の個数: 48

約数和(自身を含む): 40176000

約数和(自身を除く): 19671550

約数列:

[1, 2, 5, 10, 25, 29, 50, 58, 79, 145, 158, 179, 290, 358, 395, 725, 790, 895, 1450, 1790, 1975, 2291, 3950, 4475, 4582, 5191, 8950, 10382, 11455, 14141, 22910, 25955, 28282, 51910, 57275, 70705, 114550, 129775, 141410, 259550, 353525, 410089, 707050, 820178, 2050445, 4100890, 10252225, 20504450]

約数ペア:

[(1, 20504450), (2, 10252225), (5, 4100890), (10, 2050445), (25, 820178), (29, 707050), (50, 410089), (58, 353525), (79, 259550), (145, 141410), (158, 129775), (179, 114550), (290, 70705), (358, 57275), (395, 51910), (725, 28282), (790, 25955), (895, 22910), (1450, 14141), (1790, 11455), (1975, 10382), (2291, 8950), (3950, 5191), (4475, 4582)]