19954144

素因数分解:

$2^5\times 7^1\times {\mathrm{229}}^1\times {\mathrm{389}}^1$

素因数の和:635

約数の個数: 48

約数和(自身を含む): 45208800

約数和(自身を除く): 25254656

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 112, 224, 229, 389, 458, 778, 916, 1556, 1603, 1832, 2723, 3112, 3206, 3664, 5446, 6224, 6412, 7328, 10892, 12448, 12824, 21784, 25648, 43568, 51296, 87136, 89081, 178162, 356324, 623567, 712648, 1247134, 1425296, 2494268, 2850592, 4988536, 9977072, 19954144]

約数ペア:

[(1, 19954144), (2, 9977072), (4, 4988536), (7, 2850592), (8, 2494268), (14, 1425296), (16, 1247134), (28, 712648), (32, 623567), (56, 356324), (112, 178162), (224, 89081), (229, 87136), (389, 51296), (458, 43568), (778, 25648), (916, 21784), (1556, 12824), (1603, 12448), (1832, 10892), (2723, 7328), (3112, 6412), (3206, 6224), (3664, 5446)]