19870970

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{107}}^1\times {\mathrm{379}}^1$

素因数の和:507

約数の個数: 48

約数和(自身を含む): 42107040

約数和(自身を除く): 22236070

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 107, 214, 245, 379, 490, 535, 749, 758, 1070, 1498, 1895, 2653, 3745, 3790, 5243, 5306, 7490, 10486, 13265, 18571, 26215, 26530, 37142, 40553, 52430, 81106, 92855, 185710, 202765, 283871, 405530, 567742, 1419355, 1987097, 2838710, 3974194, 9935485, 19870970]

約数ペア:

[(1, 19870970), (2, 9935485), (5, 3974194), (7, 2838710), (10, 1987097), (14, 1419355), (35, 567742), (49, 405530), (70, 283871), (98, 202765), (107, 185710), (214, 92855), (245, 81106), (379, 52430), (490, 40553), (535, 37142), (749, 26530), (758, 26215), (1070, 18571), (1498, 13265), (1895, 10486), (2653, 7490), (3745, 5306), (3790, 5243)]