20489800

素因数分解:

$2^3\times 5^2\times {\mathrm{53}}^1\times {\mathrm{1933}}^1$

素因数の和:2002

約数の個数: 48

約数和(自身を含む): 48562740

約数和(自身を除く): 28072940

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 53, 100, 106, 200, 212, 265, 424, 530, 1060, 1325, 1933, 2120, 2650, 3866, 5300, 7732, 9665, 10600, 15464, 19330, 38660, 48325, 77320, 96650, 102449, 193300, 204898, 386600, 409796, 512245, 819592, 1024490, 2048980, 2561225, 4097960, 5122450, 10244900, 20489800]

約数ペア:

[(1, 20489800), (2, 10244900), (4, 5122450), (5, 4097960), (8, 2561225), (10, 2048980), (20, 1024490), (25, 819592), (40, 512245), (50, 409796), (53, 386600), (100, 204898), (106, 193300), (200, 102449), (212, 96650), (265, 77320), (424, 48325), (530, 38660), (1060, 19330), (1325, 15464), (1933, 10600), (2120, 9665), (2650, 7732), (3866, 5300)]