21902020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{22349}}^1$

素因数の和:22372

約数の個数: 36

約数和(自身を含む): 53505900

約数和(自身を除く): 31603880

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 22349, 44698, 89396, 111745, 156443, 223490, 312886, 446980, 625772, 782215, 1095101, 1564430, 2190202, 3128860, 4380404, 5475505, 10951010, 21902020]

約数ペア:

[(1, 21902020), (2, 10951010), (4, 5475505), (5, 4380404), (7, 3128860), (10, 2190202), (14, 1564430), (20, 1095101), (28, 782215), (35, 625772), (49, 446980), (70, 312886), (98, 223490), (140, 156443), (196, 111745), (245, 89396), (490, 44698), (980, 22349)]