21131008

素因数分解:

$2^8\times {\mathrm{197}}^1\times {\mathrm{419}}^1$

素因数の和:632

約数の個数: 36

約数和(自身を含む): 42494760

約数和(自身を除く): 21363752

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 197, 256, 394, 419, 788, 838, 1576, 1676, 3152, 3352, 6304, 6704, 12608, 13408, 25216, 26816, 50432, 53632, 82543, 107264, 165086, 330172, 660344, 1320688, 2641376, 5282752, 10565504, 21131008]

約数ペア:

[(1, 21131008), (2, 10565504), (4, 5282752), (8, 2641376), (16, 1320688), (32, 660344), (64, 330172), (128, 165086), (197, 107264), (256, 82543), (394, 53632), (419, 50432), (788, 26816), (838, 25216), (1576, 13408), (1676, 12608), (3152, 6704), (3352, 6304)]