21489760

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{7069}}^1$

素因数の和:7103

約数の個数: 48

約数和(自身を含む): 53449200

約数和(自身を除く): 31959440

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 7069, 14138, 28276, 35345, 56552, 70690, 113104, 134311, 141380, 226208, 268622, 282760, 537244, 565520, 671555, 1074488, 1131040, 1343110, 2148976, 2686220, 4297952, 5372440, 10744880, 21489760]

約数ペア:

[(1, 21489760), (2, 10744880), (4, 5372440), (5, 4297952), (8, 2686220), (10, 2148976), (16, 1343110), (19, 1131040), (20, 1074488), (32, 671555), (38, 565520), (40, 537244), (76, 282760), (80, 268622), (95, 226208), (152, 141380), (160, 134311), (190, 113104), (304, 70690), (380, 56552), (608, 35345), (760, 28276), (1520, 14138), (3040, 7069)]