19504989

素因数分解:

$3^3\times 7^2\times {\mathrm{23}}^1\times {\mathrm{641}}^1$

素因数の和:687

約数の個数: 48

約数和(自身を含む): 35130240

約数和(自身を除く): 15625251

約数列:

[1, 3, 7, 9, 21, 23, 27, 49, 63, 69, 147, 161, 189, 207, 441, 483, 621, 641, 1127, 1323, 1449, 1923, 3381, 4347, 4487, 5769, 10143, 13461, 14743, 17307, 30429, 31409, 40383, 44229, 94227, 103201, 121149, 132687, 282681, 309603, 398061, 722407, 848043, 928809, 2167221, 2786427, 6501663, 19504989]

約数ペア:

[(1, 19504989), (3, 6501663), (7, 2786427), (9, 2167221), (21, 928809), (23, 848043), (27, 722407), (49, 398061), (63, 309603), (69, 282681), (147, 132687), (161, 121149), (189, 103201), (207, 94227), (441, 44229), (483, 40383), (621, 31409), (641, 30429), (1127, 17307), (1323, 14743), (1449, 13461), (1923, 10143), (3381, 5769), (4347, 4487)]