21306040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1619}}^1$

素因数の和:1684

約数の個数: 64

約数和(自身を含む): 55987200

約数和(自身を除く): 34681160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 47, 56, 70, 94, 140, 188, 235, 280, 329, 376, 470, 658, 940, 1316, 1619, 1645, 1880, 2632, 3238, 3290, 6476, 6580, 8095, 11333, 12952, 13160, 16190, 22666, 32380, 45332, 56665, 64760, 76093, 90664, 113330, 152186, 226660, 304372, 380465, 453320, 532651, 608744, 760930, 1065302, 1521860, 2130604, 2663255, 3043720, 4261208, 5326510, 10653020, 21306040]

約数ペア:

[(1, 21306040), (2, 10653020), (4, 5326510), (5, 4261208), (7, 3043720), (8, 2663255), (10, 2130604), (14, 1521860), (20, 1065302), (28, 760930), (35, 608744), (40, 532651), (47, 453320), (56, 380465), (70, 304372), (94, 226660), (140, 152186), (188, 113330), (235, 90664), (280, 76093), (329, 64760), (376, 56665), (470, 45332), (658, 32380), (940, 22666), (1316, 16190), (1619, 13160), (1645, 12952), (1880, 11333), (2632, 8095), (3238, 6580), (3290, 6476)]