17640987

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{179}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 30723840

約数和(自身を除く): 13082853

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 133, 179, 247, 273, 361, 399, 537, 741, 1083, 1253, 1729, 2327, 2527, 3401, 3759, 4693, 5187, 6981, 7581, 10203, 14079, 16289, 23807, 32851, 44213, 48867, 64619, 71421, 98553, 132639, 193857, 309491, 452333, 840047, 928473, 1356999, 2520141, 5880329, 17640987]

約数ペア:

[(1, 17640987), (3, 5880329), (7, 2520141), (13, 1356999), (19, 928473), (21, 840047), (39, 452333), (57, 309491), (91, 193857), (133, 132639), (179, 98553), (247, 71421), (273, 64619), (361, 48867), (399, 44213), (537, 32851), (741, 23807), (1083, 16289), (1253, 14079), (1729, 10203), (2327, 7581), (2527, 6981), (3401, 5187), (3759, 4693)]