21475503

素因数分解:

$3^3\times 7^1\times {\mathrm{37}}^2\times {\mathrm{83}}^1$

素因数の和:173

約数の個数: 48

約数和(自身を含む): 37820160

約数和(自身を除く): 16344657

約数列:

[1, 3, 7, 9, 21, 27, 37, 63, 83, 111, 189, 249, 259, 333, 581, 747, 777, 999, 1369, 1743, 2241, 2331, 3071, 4107, 5229, 6993, 9213, 9583, 12321, 15687, 21497, 27639, 28749, 36963, 64491, 82917, 86247, 113627, 193473, 258741, 340881, 580419, 795389, 1022643, 2386167, 3067929, 7158501, 21475503]

約数ペア:

[(1, 21475503), (3, 7158501), (7, 3067929), (9, 2386167), (21, 1022643), (27, 795389), (37, 580419), (63, 340881), (83, 258741), (111, 193473), (189, 113627), (249, 86247), (259, 82917), (333, 64491), (581, 36963), (747, 28749), (777, 27639), (999, 21497), (1369, 15687), (1743, 12321), (2241, 9583), (2331, 9213), (3071, 6993), (4107, 5229)]