21379768

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{193}}^1\times {\mathrm{227}}^1$

素因数の和:487

約数の個数: 32

約数和(自身を含む): 41135760

約数和(自身を除く): 19755992

約数列:

[1, 2, 4, 8, 61, 122, 193, 227, 244, 386, 454, 488, 772, 908, 1544, 1816, 11773, 13847, 23546, 27694, 43811, 47092, 55388, 87622, 94184, 110776, 175244, 350488, 2672471, 5344942, 10689884, 21379768]

約数ペア:

[(1, 21379768), (2, 10689884), (4, 5344942), (8, 2672471), (61, 350488), (122, 175244), (193, 110776), (227, 94184), (244, 87622), (386, 55388), (454, 47092), (488, 43811), (772, 27694), (908, 23546), (1544, 13847), (1816, 11773)]