18538569

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 32323200

約数和(自身を除く): 13784631

約数列:

[1, 3, 7, 9, 21, 29, 63, 73, 87, 139, 203, 219, 261, 417, 511, 609, 657, 973, 1251, 1533, 1827, 2117, 2919, 4031, 4599, 6351, 8757, 10147, 12093, 14819, 19053, 28217, 30441, 36279, 44457, 71029, 84651, 91323, 133371, 213087, 253953, 294263, 639261, 882789, 2059841, 2648367, 6179523, 18538569]

約数ペア:

[(1, 18538569), (3, 6179523), (7, 2648367), (9, 2059841), (21, 882789), (29, 639261), (63, 294263), (73, 253953), (87, 213087), (139, 133371), (203, 91323), (219, 84651), (261, 71029), (417, 44457), (511, 36279), (609, 30441), (657, 28217), (973, 19053), (1251, 14819), (1533, 12093), (1827, 10147), (2117, 8757), (2919, 6351), (4031, 4599)]