21058580

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{241}}^1\times {\mathrm{257}}^1$

素因数の和:524

約数の個数: 48

約数和(自身を含む): 47201616

約数和(自身を除く): 26143036

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 241, 257, 340, 482, 514, 964, 1028, 1205, 1285, 2410, 2570, 4097, 4369, 4820, 5140, 8194, 8738, 16388, 17476, 20485, 21845, 40970, 43690, 61937, 81940, 87380, 123874, 247748, 309685, 619370, 1052929, 1238740, 2105858, 4211716, 5264645, 10529290, 21058580]

約数ペア:

[(1, 21058580), (2, 10529290), (4, 5264645), (5, 4211716), (10, 2105858), (17, 1238740), (20, 1052929), (34, 619370), (68, 309685), (85, 247748), (170, 123874), (241, 87380), (257, 81940), (340, 61937), (482, 43690), (514, 40970), (964, 21845), (1028, 20485), (1205, 17476), (1285, 16388), (2410, 8738), (2570, 8194), (4097, 5140), (4369, 4820)]