21771435

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1559}}^1$

素因数の和:1600

約数の個数: 48

約数和(自身を含む): 42681600

約数和(自身を除く): 20910165

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 49, 57, 95, 105, 133, 147, 245, 285, 399, 665, 735, 931, 1559, 1995, 2793, 4655, 4677, 7795, 10913, 13965, 23385, 29621, 32739, 54565, 76391, 88863, 148105, 163695, 207347, 229173, 381955, 444315, 622041, 1036735, 1145865, 1451429, 3110205, 4354287, 7257145, 21771435]

約数ペア:

[(1, 21771435), (3, 7257145), (5, 4354287), (7, 3110205), (15, 1451429), (19, 1145865), (21, 1036735), (35, 622041), (49, 444315), (57, 381955), (95, 229173), (105, 207347), (133, 163695), (147, 148105), (245, 88863), (285, 76391), (399, 54565), (665, 32739), (735, 29621), (931, 23385), (1559, 13965), (1995, 10913), (2793, 7795), (4655, 4677)]