21045616

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{647}}^1$

素因数の和:781

約数の個数: 40

約数和(自身を含む): 43390080

約数和(自身を除く): 22344464

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 107, 152, 214, 304, 428, 647, 856, 1294, 1712, 2033, 2588, 4066, 5176, 8132, 10352, 12293, 16264, 24586, 32528, 49172, 69229, 98344, 138458, 196688, 276916, 553832, 1107664, 1315351, 2630702, 5261404, 10522808, 21045616]

約数ペア:

[(1, 21045616), (2, 10522808), (4, 5261404), (8, 2630702), (16, 1315351), (19, 1107664), (38, 553832), (76, 276916), (107, 196688), (152, 138458), (214, 98344), (304, 69229), (428, 49172), (647, 32528), (856, 24586), (1294, 16264), (1712, 12293), (2033, 10352), (2588, 8132), (4066, 5176)]